Fair comment, I should qualified my answer: I use an ssh tunnel with auto-reconnect option, wrapped inside a systemd service. In all this years, I still have to run into a problem that wasn’t external (server down, no internet at home etc) I agree that wireguard is the proper solution however it requires a lot of extra configuration and support in both ends, which now is prevalent but not so much 5+ years ago. Also for a single port solution, ssh is so much simpler, practical and reliable, you only need an ssh user at the other end.

ExecStart=/usr/bin/ssh -NT -o ServerAliveInterval=60 -o ServerAliveCountMax=3 -o ExitOnForwardFailure=yes -R localhost:YOUR_PORT:localhost:YOUR_PORT SOME_USER@YOUR_SERVER

This. Using simple ssh tunneling with port forwarding in a similar scenario. Working flawlessly with zero maintenance for 5 years and counting. Very reliable