Why is OneNote not recognizing my handwriting or text input?

Check the status of your pen – Make sure your pen is connected to your device properly and that the ink is not depleted.
Verify your handwriting recognition settings – Go to the Settings page to make sure you are using the correct language and writing style.
Make sure the OneNote app is up-to-date – Look for available updates in the OneNote app's Store page and install updates as needed.
Check your connectivity – Your handwriting recognition, as well as other editing and viewing features in OneNote, may take longer to load if your internet connection is slow.
Clear your cache and temporary files – By clearing your cache and temporary files, you may be able to speed up recognition and other features in OneNote.
Reboot your device – A quick restart may help, as sometimes cached data or temporary files can interfere with recognition.