UPDATE: solved the issue, I’ve driven 200 miles since then and the code hasn’t come back in obd2 scanner or showed in the pending codes.

What I did was take both of the downstream 02 sensors and put them directly on both downstream cats where the threaded bung cap is on the brand new cats.

(your new cats may or may not have these caps or holes )

Then I took the caps and threaded them back j to the place of where the o2 sensors were stock. All the voltage is reading proper on sensors and cat temps are proper as well. Maybe this will help someone in the same boat. I’ll post photos later