HelixNotes is completely free, open source, with no bloat. Your notes should be yours.
So we made sure they are. https://helixnotes.com/
I don't know how you got this screenshot, nor do I care by this point. I've spent 5 minutes trying to get folders to work with 0 results. If Joplin can't be bothered to make this resonable to do in their app, then I can't be bothered to use it