Hi
Your pup is still only a baby, even at 10 months and already has gone through some of the toughest things in life ie being taken away from her mother and siblings, then thrown into a completely new surroundings with no familiar smells at all.
Give her a break - she'll come out of her shell in the next few days, just give her space and don't rush her. I'd be pretty darn shy in that environment too.
Lots of praise and encouragement and I'm sure she'll be just fine. She's not showing any fear aggression towards your other dogs, so hopefully she'll fit in with no problems
Good Luck and let us know how you get on.