They should have done a basic fit, but for someone new to the sport, it is common to just have things set up how you generally feel comfortable tooling around the parking lot. This is because where you feel safe or confident may be an awkward (physically) position. There are also plenty of things you won't realize about your fit needs until you've been riding for a while. So, I would expect that you may want to adapt your fit quite a bit over the next few months.

When I was new, I was set up with a very relaxed fit. Raised stem, which put my saddle a bit far back and low.

I got a lot of stiffness in my neck and shoulders, even though I naturally have a relaxed posture with a fair amount of elbow bend. Turns out that my reach was too short for my proportions and flexibility, and by lowering the stem a ton (thereby increasing my reach), the neck issue went away. I also enjoyed better handling and was able to move my saddle into a position where i could generate more power overall...at least eventually.

Over the years, I've dropped the stem even more, and I've moved to a more aggressive bike. I got some neck tension with my last change (indicating I may have gone too far), but I adapted. It wasn't that big of a change. Now riding the older bike, the reach feels so short (with less than 2cm difference).

I would go ask them to do a basic fit for you. Keep in mind that this will very likely not be your last fit for very long. Before you play around too much, though, spend some time on the bike, pay attention to your body, and read up on various bike fit theories.