I’ll try once more to be more clear.
We don’t need to learn the tricks; we understand perfectly well (at a high level) what is required.
Implementing it is a lot of work and none of us currently involved in Syncthing maintenance have the desire to do that work.
Explaining again how photos are accessible on iOS, or how other apps can sync things on iOS, doesn’t change this situation at all.
Someone who wants to do it and had the necessary time and ability just needs to do it.