[Bug]: TS error in flat config: reactPlugin.configs.flat is possibly undefined

[tigrr]

Is there an existing issue for this?

• I have searched the existing issues and my issue is unique
• My issue appears in the command-line and not only in the text editor

Description Overview

When configuring the plugin as per its documentation and using the typescript-eslint package's type helper like so:

export default tsEslint.config(
    reactPlugin.configs.flat.recommended
)

It produces typescript error:

'react.configs.flat' is possibly 'undefined'.ts(18048)
(property) flat?: Record<string, react.ReactFlatConfig> | undefined

Also see #3838

Expected Behavior

No error

eslint-plugin-react version

v7.37.3

eslint version

v9.14.0

node version

v22.11.0

[ljharb]

Duplicate of #3874.