diff --git a/examples/platform/efr32/FreeRTOSConfig.h b/examples/platform/efr32/FreeRTOSConfig.h
index 2039b30ffbdfe0..3408b5667aa9bc 100644
--- a/examples/platform/efr32/FreeRTOSConfig.h
+++ b/examples/platform/efr32/FreeRTOSConfig.h
@@ -198,7 +198,7 @@ See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
 
 #ifndef configTOTAL_HEAP_SIZE
 #ifdef SL_WIFI
-#define configTOTAL_HEAP_SIZE ((size_t)(28 * 1024))
+#define configTOTAL_HEAP_SIZE ((size_t)(30 * 1024))
 #else
 #define configTOTAL_HEAP_SIZE ((size_t)(20 * 1024))
 #endif
diff --git a/src/platform/EFR32/DiagnosticDataProviderImpl.cpp b/src/platform/EFR32/DiagnosticDataProviderImpl.cpp
index 780e86d9014275..146ca68777b4de 100644
--- a/src/platform/EFR32/DiagnosticDataProviderImpl.cpp
+++ b/src/platform/EFR32/DiagnosticDataProviderImpl.cpp
@@ -254,7 +254,74 @@ CHIP_ERROR DiagnosticDataProviderImpl::GetNetworkInterfaces(NetworkInterface **
     ifp->offPremiseServicesReachableIPv6.SetNull();
     ifp->type = InterfaceType::EMBER_ZCL_INTERFACE_TYPE_THREAD;
 #else
-    /* TODO */
+    NetworkInterface * head = NULL;
+    for (Inet::InterfaceIterator interfaceIterator; interfaceIterator.HasCurrent(); interfaceIterator.Next())
+    {
+        interfaceIterator.GetInterfaceName(ifp->Name, Inet::InterfaceId::kMaxIfNameLength);
+        ifp->name          = CharSpan::fromCharString(ifp->Name);
+        ifp->isOperational = true;
+        Inet::InterfaceType interfaceType;
+        if (interfaceIterator.GetInterfaceType(interfaceType) == CHIP_NO_ERROR)
+        {
+            switch (interfaceType)
+            {
+            case Inet::InterfaceType::Unknown:
+                ifp->type = EMBER_ZCL_INTERFACE_TYPE_UNSPECIFIED;
+                break;
+            case Inet::InterfaceType::WiFi:
+                ifp->type = EMBER_ZCL_INTERFACE_TYPE_WI_FI;
+                break;
+            case Inet::InterfaceType::Ethernet:
+                ifp->type = EMBER_ZCL_INTERFACE_TYPE_ETHERNET;
+                break;
+            case Inet::InterfaceType::Thread:
+                ifp->type = EMBER_ZCL_INTERFACE_TYPE_THREAD;
+                break;
+            case Inet::InterfaceType::Cellular:
+                ifp->type = EMBER_ZCL_INTERFACE_TYPE_CELLULAR;
+                break;
+            }
+        }
+        else
+        {
+            ChipLogError(DeviceLayer, "Failed to get interface type");
+        }
+
+        ifp->offPremiseServicesReachableIPv4.SetNull();
+        ifp->offPremiseServicesReachableIPv6.SetNull();
+
+        uint8_t addressSize;
+        if (interfaceIterator.GetHardwareAddress(ifp->MacAddress, addressSize, sizeof(ifp->MacAddress)) != CHIP_NO_ERROR)
+        {
+            ChipLogError(DeviceLayer, "Failed to get network hardware address");
+        }
+        else
+        {
+            ifp->hardwareAddress = ByteSpan(ifp->MacAddress, addressSize);
+        }
+
+        // Assuming IPv6-only support
+        Inet::InterfaceAddressIterator interfaceAddressIterator;
+        uint8_t ipv6AddressesCount = 0;
+        while (interfaceAddressIterator.HasCurrent() && ipv6AddressesCount < kMaxIPv6AddrCount)
+        {
+            if (interfaceAddressIterator.GetInterfaceId() == interfaceIterator.GetInterfaceId())
+            {
+                chip::Inet::IPAddress ipv6Address;
+                if (interfaceAddressIterator.GetAddress(ipv6Address) == CHIP_NO_ERROR)
+                {
+                    memcpy(ifp->Ipv6AddressesBuffer[ipv6AddressesCount], ipv6Address.Addr, kMaxIPv6AddrSize);
+                    ifp->Ipv6AddressSpans[ipv6AddressesCount] = ByteSpan(ifp->Ipv6AddressesBuffer[ipv6AddressesCount]);
+                    ipv6AddressesCount++;
+                }
+            }
+            interfaceAddressIterator.Next();
+        }
+
+        ifp->IPv6Addresses = chip::app::DataModel::List<chip::ByteSpan>(ifp->Ipv6AddressSpans, ipv6AddressesCount);
+        head               = ifp;
+    }
+    *netifpp = head;    
 #endif
     uint8_t macBuffer[ConfigurationManager::kPrimaryMACAddressLength];
     ConfigurationMgr().GetPrimary802154MACAddress(macBuffer);
diff --git a/third_party/silabs/matter_support b/third_party/silabs/matter_support
index 9696ca85ea8fde..ff9000cd65c5eb 160000
--- a/third_party/silabs/matter_support
+++ b/third_party/silabs/matter_support
@@ -1 +1 @@
-Subproject commit 9696ca85ea8fde011b7045a97da6d84785014588
+Subproject commit ff9000cd65c5ebc04818e513cb3f803d3536a718