Absolutely correct

If you can already use the phone , then it’s not blacklisted.

You only need one to be active to use the phone. So if it is blacklisted , don’t worry about it. Also if you go out of North America you can use it in other countries because Blacklist doesn’t apply world-wide

Try both imei (eSIM and non) chances are they both aren’t blacklisted (you only need one active)