GNU/Linux Ubuntu 20.04 TP-Link Archer T2U Plus Wifi Adapter Driver Setup – Step-by-step Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install TP-Link Archer T2U Plus WiFi AC600 USB Dongle Driver for Ubuntu 20.04 Focal LTS GNU/Linux.
And the Ubuntu Focal TP-Link Archer T2U Plus Setup is based on the Realtek rtl8811AU Chipset Driver Installation.
But the Realtek rtl8812AU/rtl8821AU Driver following the Realtek Documentation is supporting also the rtl8811AU Chipset.
So you may try first with the rtl8821AU Driver Setup and eventually switch to the rtl8812AU.
GNU/Linux Ubuntu 20.04 Installing TP-Link Archer T2U Plus Wireless Driver