GNU/Linux Mint 20 ASUS PCE-AC51 Wifi Driver Setup – Step-by-step Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install ASUS PCE-AC51 AC750 Wireless 802.11ac Driver in Mint 20.x Ulyana/Ulyssa/Uma/Una LTS GNU/Linux Desktop.
And the Mint 20 ASUS PCE-AC51 Setup is based on the Realtek rtl8812AE Chipset Driver Installation.
So the linked guide explain How to Download and Install the rtl8812AE 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 PCE-AC51 Wireless Driver Installation Guide