GNU/Linux Mint 20 ASUS USB-AC53 Nano Wifi Driver Setup – Step-by-step Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install ASUS USB-AC53 Nano AC1200 Wireless 802.11ac Driver in Linux Mint 20.x Ulyana/Ulyssa/Uma/Una LTS GNU/Linux.
And the Mint 20 ASUS USB-AC53 Nano Setup is based on the Realtek rtl8812BU Chipset Driver Installation.
So the linked guide explain How to Download and Install the rtl8812BU Linux Driver.
Finally, in case to check your Adapter Chipset see: How to Check Wireless Device ID on GNU/Linux.
GNU/Linux Mint 20 ASUS USB-AC53 Nano Wireless Driver Installation Guide
On the Driver Download page, take into account that the Morrownr release is currently the recommended choice for this Dongle.