There have been several posts about this issue in the 13 threads including mine. If you create a new note and then attempt to lock it when you enter your password it is rejected saying that it is incorrect. Yet you can unlock previous notes using the same password. I’m on the 13.3 beta with my iPad so I have submitted a report. In Feedback Assistant it now shows less than 10 reports and “investigation complete, unable to diagnose with supplied information.” I don’t know what other information they require. For others who have the issue and are on the betas please continue to report this. The problem also manifests itself if you try to turn Face ID off for notes, you’re asked for that password that is then rejected.