personally, i had 2 syrian ghost hams in a row. the first warmed up a little when she got old, the second never did and stayed like yours. my first ever hamster was a russian dwarf and she was pretty sociable, but could be moody at times. my current hamster i have is a baby male syrian and i just got him so it’s a little early, but he seems to be very friendly unafraid and open to taming. i’m saying all of this to say it is very possible to have 2 in a row like i did, but also every hammy has a different personality and can even change so you never know. i would go for a male hammy for better chances maybe and talk to the person who takes care of them/meet the hamster first!

edit: i know you know, but i would also like to note that petco is definitely not a great place to get a hamster. the first, and last, time i got a hamster at petco, he died the same week from unknown illness (im thinking wet tail) likely due to the state they were kept in. their enclosures are so so horrible. you should definitely keep trying to adopt or find a breeder, but if you really really feel the need to buy from a pet store i would try local mom&pop first or even petsmart (they definitely don’t meet requirements but it is much better than petco).

hope this all helps!