So this week I tried to add ipv6 support to Wireguard on AR750S.
The web UI can accept Wireguard configuration with ipv6 Address/DNS and get connected now, but I haven’t deal with VPN policies and other things for now.
I have tested with Azirevpn and Mullvad with success, if anyone is interested you can download the firmware: AR750S AR750.
Remember to enable ipv6 in MORESETTINGS->IPv6 first. Any feedback will be appreciated.