I had similar front end noises to what you are experiencing with a well cared for non thrashed (wife's) 2018 GTi. In short how a particular VW dealership responds to addressing "noises" when there is no obvious operational issue can be a lottery. However given you are still in the warranty period you have nothing to lose.
I should add that I also own a 2018 Golf R which has been for the most part suspension and steering noise free.
From early on the GTi had a variety of front end "noises" some of which could be quietened down for 6 months or so by lubricating the lower control arm bushes. However after about 60-70K km there were knocking sounds when cornering and a steering "creak" when reversing on near full lock but these remained audible to everyone except VW workshop service advisors and technicians....until the warranty period had ended. With a lot of persistence and a hint of good will thrown in I did get the dealer to partially cover costs of replacing top mounts and bearings. This quietened the knocking sounds down but the steering creak remained unchanged. So more road tests with VW "experts" and now a diagnosis of a worn steering rack that could only be addressed by replacing the steering rack, tie rods and about half a million single use TTY fasteners at a cost of almost $5K and no remaining good will credit!! I had had enough at this point and decided to quit while i was behind. I did however get the car up on a hoist and pressure washed then sprayed Inox into and around every suspension bearing or mount....and after a few thousand kms the front end has been pretty much noise free.
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