What? Bitwarden doesn't give a shit about non standard ports on services you're accessing. They're a valid part of the URI string.

Try changing your match detection settings in the add-on.

If you're talking about bitwarden not supporting being run from container on a non standard port, we'll, you're doing it wrong. Expose whatever port on the container then Add a proper reverse proxy / edge router like traefik, then set up some DNS and Let's encrypt and only use 80 and 443 for all of your services.