First, thanks to
@khronokernel and all the other developers for their work on this project.
Except for two things, I pretty much haven't had any problems with any of the macOS Monterey or Big Sur betas on my 10,1 MBPr.
I installed a BCM94360CSAX Airport card and I noticed that my Wi-Fi speeds are in the 2-4 Mbps range. I have a Windows partition on the same computer where I get 15-20 Mbps on Wi-Fi
When I build OpenCore, I see:
Found Wireless Device 14E4:43A0
Adding AirportBrcmFixup.kext 2.1.3
Should I be using a different Wi-Fi kext?