No, it’s an Immich issue. Not OP, but I was already using Synology Photos. Synology finished syncing my library in two days, while Immich was still syncing after more than a week. I decided it wasn’t worth it after that experience.

Why are you syncing from your phone instead of your Synology then? Can't you sync from your NAS then just have pictures uploaded as you take them? iOS has a lot of restrictions compared to Android so two days really doesn't feel like a meaningful difference from a week.

The 2 days were spent uploading my entire library from scratch. After that, daily syncs only take a few minutes.

I don’t think this should be framed as iOS vs Android. From a technical perspective, I understand why the behavior differs. But from a user’s perspective, all they see is that one app works much better than the other.

My family doesn’t care about the technical reasons. They just saw one app finish much sooner than the other, and they preferred the one that worked better. Based on that experience, I can’t recommend Immich to them.

I’m not an Immich or Synology user but essentially the mobile apps end up replicating your whole structure a little better, at least when I did the iCloud library to Ente import.

I could have done a data download from Apple but essentially leaving the Ente app open and choosing my albums to back up was a “set it and forget it” process.