>>as every GPS device factors ‘time travel’ in.
That’s not ‘time travel’ - it’s an adjustment due to the relativistic differences in the localized rate of state-change.
>>it’s an adjustment due to
better said as “it’s an adjustment to compensate for”
Yes it is due to relativity. It is also technically time traveling. Relativity and Time Travel are linked at the hip. But if you want to argue with Physicist Dr. Michio Kakua about that, be my guest. (I prefer discussing Schrödinger's cat myself).
As Dr Kakua explains it technically the satellites are time traveling. Just like our astronauts who went to the moon and came back to earth 10-8 seconds 'younger' than us who stayed right here. So they 'time traveled'.