Surely at this point you’d make your own Google Drive and sync your notes to there? Clearly relying on a third party API isn’t working for them financially so stop doing it. Some S3 storage and a backend isn’t that difficult and could be run for pennies.

I’m not sure from this blog post why they can’t do that?

The new requirements make sense only if there’s the possibility to contact human support. Google unfortunately is run by bots

I don’t understand why there aren’t more progressive web apps to combat this. Maybe the google drive integration would still be a problem, but you can avoid app store shenanigans by deploying directly to your users.