techliterateidiot blue (should) means that iMessage is treating the messages to you as iMessage messages, not SMS.
When your family, friends, etc message you in iMessage the chat bubbles should be green, according to Apple's documentation.
I don't know enough about Apple to help much further but I believe the problem is Apple and iMessage, so you may need to reach out to them or hope someone here can help. The problem is not your current phone, it is something to do with your migration from the iPhone and Apple's system.