Welcome to NeuroTalk. Sorry to hear of your wife's condition.

If the hospitals in the US can do any more to help her, it would be very hard to find that hospital or rehabilitation clinic. You may research rehabilitation hospitals to see if any claim to have experience with her level of injury.

The best are often associated with a medical school where ongoing research is being done.

The hyperbaric oxygen therapy is a valuable treatment for her to have frequent access to. .

The advantage of staying in Turkey is the presence of family. Having family there to talk to her or just read a book to her gives her brain familiar voices to process. In the US, she would not have as many people to do that.

My best to you.