Damn. That's such a shame, I was considering the fairphone with /e/ os but it's looking less and less appealing. I guess flashing it with CalyxOS and removing/replacing microg might be the better option. Either that or bite the bullet and get a pixel n' flash GrapheneOS to it.
I deeply aplreciate your expansion on the matter :)
Have you considered self hosting a syncing note taking service?
https://awesome-selfhosted.net/tags/note-taking--editors.html