[david_van_loon]

The issue isn't the user-hosted content - I'm running a release build of Immich on my own server and Google flagged my entire domain.

[mixologic]

Is it on your own domain?

[david_van_loon]

Yes, my own domain.

[crtasm]

Is the subdomain named immich or something more general?

[david_van_loon]

The subdomain is "immich", which has crossed my mind as a potential flagging characteristic.