In Catalina Apple has changed the write permission of system partition. By default its read only. You need to first enable write permission then install kext in Library/Extensions. Lastly don't forget to clear kext cache after kext installation. For more info check this post, specially "I can't...
You need to carefully read @CaseySJ 's wonderful solution.
Maybe you can try ASRock B360M-itx/ac patch in the spoiler.
Did you install EmuVariableUefi-64.efi on EFI/CLOVER/drivers64UEFI yet? If not then intall it and clear NVRAM and Kext Cache using Mac Optimizer 2.4 (google it) or use nvram -c (At clover boot screen select shell icon, type in the terminal).
How to check nvram:
Why did you installed AirportBrcmFixup and all Brcm related kexts? Do you have any PCIE WIFI-Bluetooth adapter installed in your machine?
I also asked you to delete all files (1-5) not only the first one.
And where did you installed all kexts?
Go to /Library/Preferences/SystemConfiguration/ take backup of these files and delete:
Restart and check. Apple will recreate...