Is it possible to integrate Noodle into iOS, i.e. upload new photos into noodle automatically, browse them on the iPhone and if I delete them on my iPhone sync this deletion to the server? AFAIK iOS discriminates against non-Apple apps and does not let them run background jobs.
Immich has an app that just needs to connect to an Immich server, which this would effectively be. It does the background sync, though I don't think it does the delete part.