GNU/Linux Mint 20 ASUS USB-AX56 Driver Setup – Step-by-step Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install ASUS USB-AX56 AX1800 Wireless 802.11ac Driver in Linux Mint 20.x Ulyana/Ulyssa/Uma/Una LTS GNU/Linux.
And the Mint 20 ASUS USB-AX56 Setup is based on the Realtek rtl8832AU Chipset Driver Installation.
So the linked guide explain How to Download and Install the rtl8832AU 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-AX56 Wireless Driver Installation Guide