⚠️ Xiaomi MIUI is NOT supported. Bluetooth++ is not compatible with it because MIUI is a heavily modified version of Android and does not even have the ability to set Device Class. MIUI users can switch to a custom ROM such as LineageOS or try the MAC address trick.
The Magisk app will show you if Magisk is installed
If you need to remove the module, first select your Default device class again. After that, you can simply disable the module or remove the module in Magisk and then reboot your device. If you somehow get stuck in a bootloop, you will need to remove modules through your custom recovery or safe mode. Remove Magisk modules in an emergency or completely uninstall Magisk by renaming Magisk APK to uninstall.zip and flash the zip in recovery like usual.