Hi Madiha,
Thank you for reaching out and sharing the details about your OneNote issue I understand how frustrating it can be when your notes aren’t working properly especially when you rely on them for your tasks. It sounds like you’ve already tried several steps so let’s look at another approach that might help resolve the glitches.
One possible solution is to reset the OneNote app completely. This process clears any corrupted settings without deleting your notebooks. To do this go to Settings select Apps select OneNote select Advanced Options and select Reset. After resetting restart your device and sign back into your Microsoft account to ensure your notebooks sync correctly. This often resolves persistent issues that updates or cache clearing don’t fix.
Could you try this and let me know if it improves the performance?
I hope this answer is helpful if you have further questions feel free to reply back
Regards,
Marcelo