I have used this configuration
and was able to install Catalina on my:
Aorus Gaming 7 X399,
Radeon Vega 64 and
WIFI/BT PCI WTXUP TX-AC94360
I have only one problem - my bluetooth doesn't work although it should natively like in project linked above ( Fenvi t919 is almost the same as WTXUP).
After installing there was no Bluetooth in "My Mac" section, but i have deleted X399 ZenithAlpha USB Port kext and now i can see it, but there is BT adres like 0.0.0.0 and system says it is Ericsson, not Broadcom.
What can i do? Do i have to install some kexts? This Bluetooth is fully workable in Windows.
And what for is this USB ports kext? Do i have to make it for my X399 Aorus?