Absolutely, you can use eSIM for your Apple Watch or iPad as long as your device is the Cellular + Wi-Fi version and supports eSIM technology. Additionally, your device must be carrier unlocked to use eSIM. 

Please check the following list to see which smart devices are compatible with eSIM.

eSIM-compatible Apple Watch devices: 

Apple Watch Series 3 GPS + Apple Watch Series 4 GPS + Apple Watch Series 5 GPS + Apple Watch Series 6 GPS + Apple Watch Series 7 GPS + Apple Watch Series 8 GPS + Apple Watch Ultra Apple Watch Series SE, SE2 GPS.

eSIM-compatible iPad devices: iPad Pro 11 inch (1st Generation, 2nd Generation, 3rd Generation) iPad Pro 12.9 inch (3rd Generation, 4th Generation, 5th Generation) iPad Air (3rd Generation, 4th Generation, 5th Generation) iPad (7th Generation, 8th Generation, 9th Generation) iPad mini (5th Generation, 6th Generation).

eSIM ONE - One touch to the world

How to install eSIM: https://esimone.com/check-device

Check Compatibility: https://esimone.com/check-device