I just realized that because I am using the TDN app to read the vehicle, I will not have access to that tune to make changes. It gets uploaded to the TDN server for my tuner to access.
2019 Mustang GT
So, I had the Roush Phase 1 installed on my car in 2019 shortly after I bought it by the same dealer I bought the car from. No issues, all was well.
I upgraded to the phase 2 about 6 months ago, and now the 36 month warranty is up, so I thought I'd go for a custom tune...