Lets try from the ground. TP-Link is connected and seen on lsusb
First, try to remove what you have
sudo dkms remove 8812au/5.6.4.2_35491.20191025 --all
Also because for some reasons rtl8812au 5.3.4 added, try next one too
sudo dkms remove rtl8812au/5.3.4 --all
Restart your PC and run step by step:
sudo apt update && sudo apt upgrade
sudo apt install git dkms
cd rtl8812au
sudo make dkms_install
Restart again. Now you can check
dkms status
the driver should be installed. Also you can check
lsmod