By chance do you have the AB info for the 2018 Expedition?
I added HS4 so what I use now would not work with your setup. Any VIN from a 2018 Expedition AB would work.
It’s just dependent on what Ford supports thru the FordPass app. The H series does not process tire pressure to the servers, just the low or high pressure alerts you would get in the vehicle. The folks that write the app probably don’t know that, as no one ever told them, they just make a generic app to cover all the variables.
Anyways, glad you got it all working. Sounds like you earned it!