The store is authentic, depending how you look at it. If it's your first time buying anything then it's definitely not worth your money. You can purchase cheaper items off Aliexpress with the right keywords - I've compiled a list on my video review of the store (thiccvic on YT, search SO AESTHETIC).
The items off Aliexpress have a lot of reviews and many people who've provided feedback tend to provide images as well. Good luck shopping, and you're welcome for saving a few bucks.
[PS: SoAesthetic tend to sell their products that are bought straight off Aliexpress 2-3 times the average price if you find it off Aliexpress.]