I have seen the April pool about new features to be implemented (I am a relatively new user). I know that making it work on iPadOS 13 is a great hassle, but I’d really like to see some more cloud service providers included in the app, either for sync or import. So here in the comments we could propose cloud providers and vote on them by liking them.
I would suggest OneDrive, since MS Office365 is heavily used in companies. (E.g. since I am using Notes Plus for work, I am not allowed to sync to any other cloud provider than OneDrive, which is used in our company) Currently I don’t have AutoBackup at all.