Can’t connect my phone number to iMessage

I installed an eSIM in my phone about 2 weeks ago and ever since, my phone has refused to register regular number on iMessage. I’ve gone to “Sign-in & Security” and it says I must have a SIM associated with an Apple device for “my number” to use on iMessage or FaceTime but I very much still have my SIM in my phone. How can I fix this?