I have a solution you may not like but dont need any extra hardware.
1. install QEMU/KVM
2. setup a new VM with "tiny11core" (
https://github.com/ntdevlabs/tiny11builder )
3. install the MT7902 driver there (
https://dlcdnets.asus.com/pub/ASUS/n...?model=X1704ZA )
4. go to the network adaptors and create a bridge between the WLAN and the vmLAN
5. configure the virtual network on the linux side ( gateway and DNS server = routerIP )