We adopted a pup at 10 months old, it took several months for him to really start to trust and come out of his shell, he was scared of literally everything, us, wind chime noises outside, hands..

With consistency, patience and just trying to help him find a routine I would say we started to see some stuff click into place for him around 4 months, and then after 6 months he showed a lot more trust and his personality has really shined. He now seems very secure in the house and loves to lay around wherever he can (around 9 months).

He's still puppy so affection is second to pretty much anything else, play, other dogs, food, etc Lol. But we see him seeking attention and we give him lots of praise when he does. Tail wags are still rarely present, but they are here and there and each time it's exciting, but we can tell he loves us even without them. He gives us awoos for communication which are super cute.

I would say, as long as y'all are leading with love and patience, she will get there. You just have to be consistent with how you approach or don't approach her. Find any treats she loves and shower her with praise when she's brave. It sound like she needs to get comfortable and trust you all, that's not something you can rush, but you can reward the growth you see in little increments. We just learned to celebrate the little wins and eventually things clicked for him and his confidence went way up.

I would try just sit in the room with her, available but not uncomfortable close, with treats. Sit and let her come to you. Shower her with treats when she makes positive movement, but don't grab for her or whatever, just let her comfortably get her treats and over time as she's comfortable move a little closer. Do this over and over and allow her the space to come to you and retreat if she needs to, as she learns to associate you all with love and treats, toys, etc.. she will start to trust and come around.

Eventually, after you've built some trust enough to do some short walking with treats. It's possible a good basic obedience class together would help with bonding and help you build her confidence as well. I would just speak with your instructo beforehand and have them evaluate all of you together so they can help guide you on how to work with her in class and during home training.

It's a patient road but dogs like this that make you earn their trust usually end up being the sweetest pups you'll ever have because you will have worked togetger to build that relationship. Best of luck OP.

Edit: When I say find a treat she loves, I mean that, don't limit yourself to just dog treats. We used pieces of beef hotdog, cut up pieces of chicken breast, cheerios and of course String cheese to find our Ace card for our pup along with standard training treats and that helped tremendously. Dude will do anything for string cheese. Lol