Letter P not working on keyboard - 10mm of full right side

I have iPhone 13 just over a year old and it has suddenly developed this issue. Here is what we have tried so far.

1. Removed phone case
2. Removed Screen protector
3. Ensure the phone is up to date
4. Cleaned screen to ensure nothing is stopping the touch sensor from activating
5. Restarted the phone
6. Done force reboot - Up button, Down button, and 20sec side button (apple logo etc)
7. Done erase all content and settings
8. Setup iPhone as new rather than backup
9. Setup iPhone from back up.

No change. Still, the right side of the 10mm screen is not responsive. I have set the keyboard to one-handed operation i.e. shifted slightly lift so I can access all keys.

Any help on this issue is fully appreciated. It looks like this is not an isolated case. Internet searches are full of them.

Thanks,

Piyush