Based on my experiences, I don't have much if any faith in dealership "applied coatings".
My good friend and bassist bought a 2022 BMW M3 and they told him it had a ceramic coating that they had a $3000.00 price tag on it.
When he brought it to the shop for PPF and tint, a bird nailed it in the parking lot.
The time it took for him to pick up his Macan, hang with us a bit and head out the droppings etched the paint. It was maybe 20 minutes.
To me, it didn't look like there was any coating on the vehicle. There was something, but jot a coating. Maybe a wax or spray sealant, because something was on there.
So while it was in the shop, after hours I polished it with Hyper Polish and coated with Gloss Coat.
It may not be the case with you, and if it's not, a decon process would probably set you up for your choice of protection either way.
Wash, iron remover, dry, panel wipe, apply your coat. If it's what Joe had on his M3, that process would likely remove whatever the stealership applied, or clean the coating to the point you could apply yours.