You went off scripted so I can’t help you anymore. I gave you a specific way to do it. If you set up a raspberry Pi you should be able to update uboot and the GL.iNet firmware.

Good luck

Check the vpn proxy settings in vpn dashboard if your wgclients are actually connected to may not be allowed to leave the LAN and use the WAN

If you look at the uboot thread Uboot needs to be updated to avoid issues going forword in firmware