The inability to export, as well as the lack of anything more than the bare basic formatting options (at least at the time a few years ago) pushed me off apple notes.
I’ve been able to export since early, early iPhone. They’re just txt files. Surprisingly, Apple notes have been the most durable as Apple has migrated them from every iPhone I’ve had for the past 15-20 years or whatever.
Basic formatting is a plus for me. Although now notes has really advanced formatting and even sketching.
I ended up using Exporter from the App Store. I didn't work great. I have an export, but there are a lot of issues with it. I'm finding it is often easier to copy the note and use the Rich Text to Markdown action in Shortcuts, then paste into Obsidian. If I spent more time with Shortcuts there is probably a way to automate this way a bit more.
Basic formatting is a plus for me. Although now notes has really advanced formatting and even sketching.