Not sure where I should start troubleshooting. I am a digital nomad, not even there so it makes things a bit harder. But I might be able to get a relative to debug.
Wireguard app with tunnels was working fine and then now, nothing is working now.
I had setup port forwarding - on At&T BGW210-700 gateway to get all of this to work.
I use an AR300m as my Wireguard and Softether VPN server and I also travel for months at a time. Past experiences have shown me that there seems to be memory leaks in.these devices, so I have a Cron job reboot my AR300m daily. It’s been running fine for over a year now.
Have you had someone power cycle your device, to see if that gets it going again?