The issue date and the date of the provisional status should be on the license itself. How did the officer determine that you were driving in violation of your provisional status?
The status would also be in the DMV data accessed by the officer or his dispatcher. It's possible that the DMV's data was out of whack, in which case you'll likely need your license printout to take with you to court to show you were no longer provisional.
I'm wondering if when you got your RealID the DMV issued a new provisional license and erroneously used the new issue date as opposed to the original one. That makes more sense.
The officer pointed to the issuing date at the bottom right corner of the front of my license that had the date of 07/31/2019, the month that I applied for my RealID.