diff --git a/packages/platforms/react-native/lib/client.ts b/packages/platforms/react-native/lib/client.ts
index 70b18ef1c..f498a2e2f 100644
--- a/packages/platforms/react-native/lib/client.ts
+++ b/packages/platforms/react-native/lib/client.ts
@@ -1,12 +1,11 @@
 import { createClient } from '@bugsnag/core-performance'
 import createFetchDeliveryFactory from '@bugsnag/delivery-fetch-performance'
 import { createXmlHttpRequestTracker } from '@bugsnag/request-tracker-performance'
-import { AppRegistry, AppState, Platform } from 'react-native'
+import { AppRegistry, AppState } from 'react-native'
 import { FileSystem } from 'react-native-file-access'
 import { AppStartPlugin, NetworkRequestPlugin } from './auto-instrumentation'
 import createClock from './clock'
 import createSchema from './config'
-import type { ReactNativeConfiguration } from './config'
 import createIdGenerator from './id-generator'
 import NativeBugsnagPerformance from './native'
 import persistenceFactory from './persistence'
@@ -25,8 +24,6 @@ import { ReactNativeSpanFactory } from './span-factory'
 // @ts-expect-error Element implicitly has an 'any' type because type 'typeof globalThis' has no index signature.
 const isDebuggingRemotely = !global.nativeCallSyncHook && !global.RN$Bridgeless
 
-const isNativePerformanceAvailable = NativeBugsnagPerformance !== null && NativeBugsnagPerformance.isNativePerformanceAvailable()
-
 const clock = createClock(performance)
 const appStartTime = clock.now()
 const deliveryFactory = createFetchDeliveryFactory(fetch, clock)
@@ -56,28 +53,7 @@ const BugsnagPerformance = createClient({
   spanAttributesSource,
   retryQueueFactory: createRetryQueueFactory(FileSystem),
   spanFactory: ReactNativeSpanFactory,
-  platformExtensions: (spanFactory, spanContextStorage) => platformExtensions(appStartTime, clock, spanFactory as ReactNativeSpanFactory, spanContextStorage)
+  platformExtensions: (spanFactory, spanContextStorage) => platformExtensions(appStartTime, clock, schema, spanFactory as ReactNativeSpanFactory, spanContextStorage)
 })
 
-BugsnagPerformance.attach = (config) => {
-  const logger = schema.logger.validate(config?.logger) ? config.logger : schema.logger.defaultValue
-  if (!isNativePerformanceAvailable) {
-    logger.warn(`Could not attach to native SDK. No compatible version of Bugsnag ${Platform.OS} performance was found`)
-    return
-  }
-
-  const nativeConfig = NativeBugsnagPerformance?.getNativeConfiguration()
-  if (!nativeConfig) {
-    logger.warn(`Could not attach to native SDK. Bugsnag ${Platform.OS} performance has not been started`)
-    return
-  }
-
-  const finalConfig: ReactNativeConfiguration = {
-    ...config,
-    ...nativeConfig
-  }
-
-  BugsnagPerformance.start(finalConfig)
-}
-
 export default BugsnagPerformance
diff --git a/packages/platforms/react-native/lib/platform-extensions.tsx b/packages/platforms/react-native/lib/platform-extensions.tsx
index 17c5b3614..1f7b0c419 100644
--- a/packages/platforms/react-native/lib/platform-extensions.tsx
+++ b/packages/platforms/react-native/lib/platform-extensions.tsx
@@ -1,20 +1,22 @@
-import type { Clock, SpanContextStorage, SpanOptions } from '@bugsnag/core-performance'
+import type { Client, Clock, SpanContextStorage, SpanOptions } from '@bugsnag/core-performance'
 import React from 'react'
-import type { ReactNativeAttachConfiguration } from './config'
+import { Platform } from 'react-native'
+import NativeBugsnagPerformance from './native'
+import type { ReactNativeAttachConfiguration, ReactNativeConfiguration, ReactNativeSchema } from './config'
 import { createAppStartSpan } from './create-app-start-span'
 import { createNavigationSpan } from './create-navigation-span'
 import type { ReactNativeSpanFactory } from './span-factory'
 
 type NavigationSpanOptions = Omit<SpanOptions, 'isFirstClass'>
 
-export const platformExtensions = (appStartTime: number, clock: Clock, spanFactory: ReactNativeSpanFactory, spanContextStorage: SpanContextStorage) => ({
-  startNavigationSpan: (routeName: string, spanOptions?: NavigationSpanOptions) => {
+export const platformExtensions = (appStartTime: number, clock: Clock, schema: ReactNativeSchema, spanFactory: ReactNativeSpanFactory, spanContextStorage: SpanContextStorage) => ({
+  startNavigationSpan: function (routeName: string, spanOptions?: NavigationSpanOptions) {
     const cleanOptions = spanFactory.validateSpanOptions(routeName, spanOptions)
     cleanOptions.options.isFirstClass = true
     const span = createNavigationSpan(spanFactory, cleanOptions.name, cleanOptions.options)
     return spanFactory.toPublicApi(span)
   },
-  withInstrumentedAppStarts: (App: React.FC) => {
+  withInstrumentedAppStarts: function (App: React.FC) {
     const appStartSpan = createAppStartSpan(spanFactory, appStartTime)
 
     return () => {
@@ -27,8 +29,27 @@ export const platformExtensions = (appStartTime: number, clock: Clock, spanFacto
       return <App />
     }
   },
-  attach: (config?: ReactNativeAttachConfiguration) => {
-    // this noop implementation is overridden by the client and is just defined here for correct typing
+  attach: function (config?: ReactNativeAttachConfiguration) {
+    const logger = schema.logger.validate(config?.logger) ? config.logger : schema.logger.defaultValue
+    const isNativePerformanceAvailable = NativeBugsnagPerformance !== null && NativeBugsnagPerformance.isNativePerformanceAvailable()
+    if (!isNativePerformanceAvailable) {
+      logger.warn(`Could not attach to native SDK. No compatible version of Bugsnag ${Platform.OS} performance was found`)
+      return
+    }
+
+    const nativeConfig = NativeBugsnagPerformance?.getNativeConfiguration()
+    if (!nativeConfig) {
+      logger.warn(`Could not attach to native SDK. Bugsnag ${Platform.OS} performance has not been started`)
+      return
+    }
+
+    const finalConfig: ReactNativeConfiguration = {
+      ...config,
+      ...nativeConfig
+    }
+
+    const client = this as unknown as Client<ReactNativeConfiguration>
+    client.start(finalConfig)
   }
 })
 
diff --git a/packages/platforms/react-native/tests/platform-extensions.test.ts b/packages/platforms/react-native/tests/platform-extensions.test.ts
index 19597e7d7..393f854a8 100644
--- a/packages/platforms/react-native/tests/platform-extensions.test.ts
+++ b/packages/platforms/react-native/tests/platform-extensions.test.ts
@@ -1,4 +1,5 @@
 import type { ReactNativeSpanFactory } from '../lib'
+import createSchema from '../lib/config'
 import { platformExtensions } from '../lib/platform-extensions'
 import { createTestClient, IncrementingClock, InMemoryDelivery, VALID_API_KEY } from '@bugsnag/js-performance-test-utilities'
 
@@ -8,7 +9,11 @@ describe('startNavigationSpan', () => {
   it('creates a navigation span', async () => {
     const delivery = new InMemoryDelivery()
     const clock = new IncrementingClock()
-    const testClient = createTestClient({ deliveryFactory: () => delivery, platformExtensions: (spanFactory, spanContextStorage) => platformExtensions(0, clock, spanFactory as unknown as ReactNativeSpanFactory, spanContextStorage) })
+    const testClient = createTestClient({
+      deliveryFactory: () => delivery,
+      platformExtensions: (spanFactory, spanContextStorage) => platformExtensions(0, clock, createSchema(), spanFactory as unknown as ReactNativeSpanFactory, spanContextStorage)
+    })
+
     testClient.start({ apiKey: VALID_API_KEY })
     await jest.runOnlyPendingTimersAsync()