How is there not a single YouTube review of the new trims yet if they are already being delivered?
It's not uncommon for the press to be doing their reviews until the car has already been on sale for a few months. If you watch a lot of the YouTube reviews, DrivenCarReviews, Alex on Autos, TFL, etc. they are all doing the same cars around the same time and it typically is a little bit after the on sale date begins.
This.
often times reviewers are given the car in advance but are contractually obligated not to release them until after a set date. Remember back when the 2017 came out, some reviewers even made mention of it in their reviews.