Selecting icloud account to sync to

Is there a way to sync my bear notes to another icloud account than the default one logged in on Mac? I think this would be helpful because often the base icloud account differs from the account I want to sync the notes with

Does iCloud even give you the option to enable iCloud Drive on anything except the primary account?

Not Drive exactly but you can apparently sync data to a secondary account. I’m thinking just the ability to choose an iCloud account would help here.