Hi Cammie,
Welcome to Permies! Great to have you here!
No expert here, and I have killed my fair share of young
apple trees. Just sayin.
It is not unusual for a new transplant to wilt ~ the whole process is fairly traumatic for the tree, and can take some time to recover. In the meantime, make sure it is getting at least an inch of
water per week, and you may want to put 2 - 3” of mulch around it.
Good luck, and keep us updated!