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.
Why would you want this? What's the point of the server if you mirror deletes?
I have the opposite problem, well, my partner does. Her phone regularly fills up completely with pictures so I want to copy them to a server and then delete them from the phone, but for some reason this doesn't seem to be supported. My theory is Apple wants you to keep buying newer phones with exorbitantly priced storage upgrades.
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.