If you have an ASUS AC56 can tell you this works with Mint. That includes LMDE.
How to Install RTL8814AU Wireless Driver in Ubuntu 19.10
This quick tutorial shows how to install RTL8814AU and RTL8812AU/21AU drives in Ubuntu 19.10 with Kernel 5.13. First plug your Ubuntu machine into a wired internet connection. Then open terminal ei…