To get rid of your tire size, go back into Forscan and do the following process:
Key On Ignition off, PCM Relearn Data
Key On Ignition off, TCM Relearn Data
Key On Ignition off, AWD Relearn Data
Now start the engine, yes start the engine, TCM Relearn Data, follow the instructions and it will tell you when to turn the engine off. Once this is done, clear your codes and all codes pertaining to tire size change should be gone.
The key here is the final relearn with the engine running for the TCM on 2023+ model years.