Uff…

No issues with GrapheneOS as their sandboxed Google Play Services are 1:1 bug compatible with built-in ROMs. MicroG is hit or miss though.

I would shortly say LineageOS for customisation (root, microG) while being insecure and somehow private While GrapheneOS is private, secure out of the box that customisation is possible (rooting for example or Shizuku) it’s security burden and flaw and defeats the purpose of the OS.

iodeOS I haven’t used so Idk

I do use it for tracking studying time or cycling.

I recommend also something similar in terms of time: https://f-droid.org/packages/com.razeeman.util.simpletimetracker/

How about something more recent? :)