your question is power. Doubt not many can answer.Question on Singtel number share:
1) mobile line number A go for number share for eSim
2) mobile line number B paired with AW cellular
Can eSim line A still work on AW even though the phone that is paired with AW is on line B?
I’m just speculating by guessing it should work. I believe you still have to setup with Line A first. Once esim is successfully registered. Then unpair it retaining the esim profile. Go to Line B phone and restore the pairing.
Provided it’s same Apple ID on both phone, if not you can’t restore the applewatch backup.
Also there’s a problem, if your watch is in range with Line B phone, Line A’s phone is turned off, the cellular mode wouldn’t kick in since it’s defaulted to Bluetooth and WiFi connectivity first.
Vice versa, if Line B is disconnected(e.g. turned off) your AW will go ring whenever your incoming calls come in on Line A

