CoPay is on the phone but not showing the prior wallet. That is why I am trying to figure out exactly where in the file system of the phone the keys were kept.
So you are looking for data path or directory where you can find the data for Copay that includes private keys?
I don't know what is the exact name of the file but you can check the directory path
/var/mobile/Containers/Data/Application/
Or this
/var/mobile/Applications/
Check that folder and look for the copay folder. Use some tool like 3utools to access that directory path or use iBrowser.
However, I believe that you can't easily find the wallet file for Copay IOS they mostly hide those important data for privacy. The only way to find those hidden data is to Jailbreak the unit.