Brand new 2020 won’t start

[AEdelheit]

If its gonna sit awhile, how bout just disconnecting the batteries negative lead?

I would not do this on a new truck, all computers have to relearn and setting reset after the batteries were re connected every time.

 

[Ozymandias]

Yes to the fob. Drivers batt 11.5 passenger 19.5 will charge over night and check um in the am suspect the passenger side is tango uniform

If you see such a difference then there is something badly wrong.
They are wired in parallel and therefore should ALWAYS show the same voltage.

You are in for trip to the dealer to examine why your truck drains the system.
50ft is by far enough distance to set the system to sleep, @sag2 could tell us how far the near field communication works around the truck.
People sometimes mix that up with the normal range of the remote but that are two different systems.

Simple homemade test, set your FOB on the ground 3 yard away from the vehicle and try to open a door, shouldn't work.

 

[HPSimpson]

I have discovered at least with my Ram have to be ten feet away!

 

[Regcabguy]

Too much stuff.