Apple iPad Pro 12.9 (2021)
iPadOS 16.1
1. Find "Other ..."
Press Settings.
Press Mobile Data.
Press Add a New Plan.
Press Other ....
2. Scan QR code
Place the QR code you've received inside the tablet camera frame to scan the code.
3. Activate eSIM
Press Continue.
Press Done.
4. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.