* What i'm about to say is accurage to my 2017, I doubt they changed for 2019, but double check as needed. *Yes, that's true, but the whole center surround has to be removed to get to that one. I was hoping to find something in the center console area instead.
It is possible to access the wiring of the power outlet in the dash next to the media hub without pulling the world apart. From the passenger side, the lower trim panel that extends from the front footwell to the center arm rest and adjacent to the seat can be removed (or pulled far enough back to get your hand in the tight areas). you'll need a trim tool to unplug the connector to the outlet. If you plan on removing the entire trim piece, the shifter surround will need to be lifted in the rear about 1/2" as it uses the side trim piece as a mounting point.
With the side piece off and the shiter bezel lifted, you should also have access to the outlet wiring in center console. At this point, you can unplug that also. Add a t-harness between the stock wiring and outlet now you've got a place to tap into.
As i've typed all this out, it may be more convenient to use the battery as the constant supply, but use the outlet under HVAC controls as the RUN source.
This image isn't great at showing the trim panel part, but you can see where its pulled back a bit in the front corner. Pink w/yellow = 12+ (acc/run). Orange w/gray = backlight (for that light inside the outlet - dont connect to this). black = ground. If you want to make your own t-harness, partnumbers and pricing from Mouser are in this thread 12 Volt Power Adapter for the WK2