GNU/Linux Ubuntu 20.04 TP-Link Archer T9UH Wifi Driver Setup – Step-by-step Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install TP-Link Archer T9UH AC1300 Wireless 802.11ac Driver for Ubuntu 20.04 Focal LTS GNU/Linux Desktop.
And the Ubuntu 20.04 TP-Link Archer T9UH Adapter is based on the Realtek rtl8814AU Chipset.
So here below you find instructions to Install rtl8814AU Driver on Ubuntu.
GNU/Linux Ubuntu TP-Link Archer T9UH Wireless Driver Installation Guide