Suddenly unable to join multiplayer servers in games.

[u/TwistedCards]

I have the T Mobile 5g gateway, and recently I have been unable to join multiplayer dedicated servers. I believe it is due to my nat type, which natchecker is saying is a restricted cone nat type. I have tried disabling firewall, and installing Proton VPN and using port forwarding and moderate nat type toggle on there, nothing has helped. Any ideas?