[talhah]

Immich on mobile doesn't give you much flexibility with where each local folder gets uploaded to yet so it doesn't preserve folder structure. If you're using the CLI you can program the structure and tell it which album a folder can map to.

[Jnr]

You can add any folder to immich as external library. No need to use cli.

So if you want custom structure, synchronize files from mobile to server in any way you prefer (Syncthing, PhotoSync, etc.) and add that folder as an external library.

[talhah]

This is quite a basic feature which should be inbuilt to the Immich mobile app. It's a common use case to want your screenshots, WhatsApp media album to not be displayed on the main timeline.

If you're running an instance for less technical users it's more hiccups to setup syncthing etc and have to explain why another app is needed.