I just tried to set up my phone...I backed up using my beta 4 iOS 13, but when I got the new phone...it would NOT read that backup...I thought it did last year.
If your old phone was on the latest 13.1 beta, you will need to update your 11 pro to the same 13.1 beta before you can restore your backup. The phone ships with 13.0, which can’t read a 13.1 backup.