My son has an SE watch and uses it a lot. He loves it. I have it set up as a family Watch from my phone.

If I were to acquire a separate iPhone for him, how can I move his Watch from my phone to his own phone? His Apple ID would still be part of our overall family setup of course.

If I simply un pair it from my phone and pair it with a different phone, will that work without wiping his Watch? That’s my main concern, I don’t want the Watch to end up being wiped in the process.