How to Install ASUS USB-AC51 Driver on Gnu/Linux Distros
GNU/Linux ASUS USB-AC51 Wifi Driver Setup – Step-by-step Guide
Hi! The Tutorial Shows You Step-by-Step How to Install ASUS USB-AC51 Wireless Wi-fi/Bluetooth Driver in GNU/Linux Distributions.
And the ASUS USB-AC51 Driver for Linux is supported by the Mediatek MT7610U Kernel Module.
Especially relevant: this Driver is supplied from Linux 4.19 but some important Connection Issues has been fixed only starting from the 5.4.1 release.
But on Debian-based it may be just missing the Proprietary Firmware!