IntelMausi is for Intel Ethernet not wifi, you need to finder AirportItlwm for Monterey, but since you have wifi working, I assume you did now.
As for Bluetooth, most likely your USB ports is not working since you disabled your UTBMap.kext and USBToolBox.kext.
You should be able to switch back to MBP13,1 since you already successfully installed Monterey.