Thank you. I tried 9090, of course, but is not working. The service seems to be running though.
[09:03:03] root@RPi4:~# sudo systemctl status code-server
● code-server.service - Code Server IDE
Loaded: loaded (/lib/systemd/system/code-server.service; enabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: exit-code) since Thu 2023-01-12 09:03:04 CET; 1s ago
Process: 9363 ExecStart=/opt/coder/code-server --port 9090 --auth none --disable-telemetry (code=exited, status=203/EXEC)
Main PID: 9363 (code=exited, status=203/EXEC)