The Alfa AWUS036ACH, AWUS1900, and AWUS036AC can run with monitor mode and injection support on Kali Linux 2020.3. But Github has a new driver package for Realtek RTL8812AU and RTL8814AU based devices that is different from past versions. We have a new video showing how to do the driver download and installation.
Nice howto video!
Glad you enjoy my drivers. There is a new driver available for 8814AU chipsets, it will be separated, so the repo for standalone driver is
https://github.com/aircrack-ng/rtl8814au
— kimocoder