Basic apps :
They are working on the gallery app 😉 Tho, google apps are pretty great and well integrated into android, file app by google is really good for example
Colors :
Colors are meant to be dimed a lot in Nothing OS, I guess it’s a design point of view by the Nothing team. I don’t mind it myself
Icon pack :
The Nothiong Icon pack convert all icons indeed, maybe you have a bug or it is not well applied, but it changes all icons no matter what.
Folder get closed :
I think it’s an android behavior, so I don’t think Nothing wil be able to change that.
System fonts :
Their should be a workaround somewhere, try to look out the Nothing XDA Forum.