Have them check the rear shock setting. I've yet to do that on mine but Lord willing hopefully there's some adjustment to make it a softer to ride for my tailbone. There's a site
https://www.wunderlichamerica.com/
That sells a rear rack to move the BMW Vero trunk further back so it doesn't take up a third of the backseat, if you elect to buy the trunk. I'm not impressed with the BMW windshield even with a lip extender, so I would suggest you look aftermarket and check this site for other reviews. Yes, ensure it has the built-in fast charger so you can take it to a level 2 charging station. That's very important that it has that feature I feel.
I do like the little side bag that goes on the right side of the bike. It doesn't take up a lot of room and I got the dark brown color one. I think to match my dark gray color paint. But if you get that trunk relocation bracket, I don't think you can use that side bag.
Thinking I saw somewhere on a site that maybe BMW now makes some bracket. You can put on those rear turn signals to help protect them so they don't get broken off. Maybe someone else on the forum can advise.
My seat came with a little hump in the middle which actually helps so I can put my ass on there if I go over pumps so the bumps aren't so hard on my back. Though with my Vero trunk and with the standard BMW mounting hardware I can actually slide myself back and rest against the trunk when I'm actually riding the motorcycle.
Enjoy your new ride. I wish I had checked with some other dealers for a lower price than what I paid.
I believe it's suggested that you only charge it to 80% unless you know you're going on a really long ride and you need more juice and the battery pack and once it gets down to like 20%, charge it as well if you're doing local riding. But if you're going on a long ride, you may not have that luxury and you'll get back home below 10%