It would be very nice if I could import my whole Notion documents/structure into drive, so I could use proton docs as a notion replacement.
I find the proton docs editor already very similar to the functionality of the notion editor (60% ?). I guess there are still several formatting options missing, but proton docs is already pretty similar, so i am asking for the notion import option.

Maybe you could use some open source code from anytype, which is pretty close to notion, too.