Yep, like others said this is called ”rail dust”. Small flakes of metal floating in the air, which can be caused by train brakes during delivery (hence the name rail dust), but are also more often caused by the brakes of the car or other cars on the road. These metal flakes stick to your paint and rust causing the dots. It isn’t your actual car rusting, it is the metal flakes stuck to your paint rusting. It happens to all cars but its mainly visible on white cars. I had it on 2 white cars I owned (a 1999 Buick Regal and 2010 Honda Civic). Also see it on our white vehicles at work (Ram, F-150, Tahoe, Charger Pursuit). But truth be told if you’d stare hard enough you will see it on other colours as well.
I don’t think this will be considered a warranty issue because it has nothing to do with any defect in the car or the paint, it is caused by the environment, just like rock chips, tree sap, etc. Worth a shot though I guess.