Does anyone know if it’s possible to achieve this? Possibly with an external service that syncs the two?
Basically, the last feature immich can’t do that google does is to share albums. Sometimes my family wants to have albums after events, and my ones live in a silo.
You definitely can if you put Immich behind a reverse proxy like Caddy and open it up to the rest of the world. I also protect my instance against bots with Crowdsec. That’s how share albums with family and friends.