Here's what I know about the front bumper. Maybe it will help you. I'll provide some background...
I had body work done on my front bumper (2015) to repair a big (self-inflicted) wall scrape. Multiple body shops told me, in order to do the work right, the front bumper needs to be completely removed. My biggest concern was alignment to the lights, hood and 1/4 panels after the bumper was re-installed.
After I selected a shop, we took 360 pictures of the alignment "as found". My body shop said that two brackets are primarily responsible for alignment of the bumper to the rest of the car. Therefore, in order to guarantee alignment, he recommended I purchase two new brackets. In his words, once the bumper is removed, the old (original) brackets should be replaced because the bumper "never aligns right" if you reuse the original brackets. I trusted him, purchased new brackets, and the bumper aligned perfectly. I can't say for sure if they replaced the brackets or not. However, the end result was a tight and aligned fit.
Assuming the dealership may try to employ the most cost effective solution, I doubt they'll plan on replacing the brackets. I recommend taking this information to the dealer if you decide to get the alignment addressed or, for peace of mind, take it to some independent shops and get their feedback. If more than 2 shops recommend replacing the brackets, like all of my quotes did, you'll have ammunition to ask the same of the dealer.
I hope everything works out for you.