Googling this question gives a wide variety of results but I don't see anyone actually asking or answering it so…wtf?
Long press, nothing but share, delete, archive, or add to album. No sync, download or anything of the sort. Is immich supposing it's a one-way trip? What if I want a photo I backed up a year ago, I have to open the webui?
Ahhh see I had everything backed up already. Shit. I should've tried it after deleting something. I figured it would find a button and be asked where I wanted to put the file. Share kinda works for that.