If OneNote is not recognizing your touch gestures on a touchscreen device for Mac, here are a some suggestions to try:

1. Check for Updates: Make sure that both OneNote and macOS are up-to-date.
2. Change Preferences: Open OneNote preferences and uncheck the Use touchscreen mode setting.
3. Calibrate Touchscreen: Adjust the calibration of your touchscreen in macOS.
4. Relaunch OneNote: Quit OneNote and relaunch it to reset it.
5. Reset macOS:’ Reset macOS to its default settings.