GNU/Linux Manjaro TP-Link Archer T4U Plus Wifi Driver Setup – Step-by-step Guide
The linked tutorial shows you step-by-step How to Install TP-Link Archer T4U Plus AC1300 Wireless 802.11ac Driver on Manjaro GNU/Linux desktop – Step by step Tutorial.
And the Manjaro TP-Link Archer T4U Plus Adapter is based on the Realtek rtl8812AU Chipset.
So here below you find instructions to Install rtl8812AU Driver on Manjaro.
GNU/Linux Manjaro TP-Link Archer T4U Plus Wireless Driver Installation Guide