To function correctly, the kext must be configured properly in the bootloader configuration (config.plist):
In older versions of macOS (Big Sur and earlier), developers used BrcmBluetoothInjector.kext to tell the system how to handle non-native Broadcom cards. However, the framework changes in Monterey rendered this injector obsolete and, in many cases, caused system crashes. acidanthera/BrcmPatchRAM - GitHub bluetoolfixup.kext