I really hope she gets better. I was thinking about you in my subconscious the whole day. I saw Shodu yesterday and his left wing seemed drooped so I came close and examined him. He got scared of me looking and flew and his wing was normal.
I remember seeing a picture of Peach with her harness. If she can let you put it on, I don't think it would be too much of a problem. But obviously, she is your bird so you probably know more about her trusting progress than me.