I am curious, how is the experience of running GrapheneOS on the Google Fold? On my Pixel 6 it runs quite well, but I would imagine that the Folding aspect brings in quite a bit of additional complexity.
It's individual apps that need fold and/or tablet support like I have the use Gboard to get a decent tablet mode keyboard and the Pixel Camera to support the different camera modes.
Overall it's quite obvious that it's really a phone + tablet which means a lot of things work OK but won't handle the 90 degree fold mode (table top) well. Also the tablet UI of many apps (especially FOSS) are unpolished.