@Note20Ultra: If you have recently added a screen protector to your Note 20 Ultra, head to Settings > Display > Touch sensitivity, and toggle this option on. Let me know if this helps.
I'd suggest to remove the screen protector you've fitted as it's hindering the operation of your screen.
Sometimes privacy protectors cause this issue.
I use the official Samsung Tpu Screen protector that's works flawlessly with my sPen and fingerprint scanner.
If I can be of any further help then please don't hesitate. Take care. 😎
Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "