I got a horse who was retired from racing because of a full suspensory tear with major DFFT involvement - the suspensory blew and the whole kaboodle went with it. He has got some jewelry up front.
He’s doing BN with his 70 y/o rider. He will always have a slightly lesser degree of motion in that front forelimb, but you would only notice it if you were very good at lameness.
I hope you can get an appointment sooner than 3 weeks (if that’s what you wish) and that you get some answers. I know what you mean about some hospitals treating it like a learning experience. I have one local I love, and one I won’t go to for that reason (and the depth of knowledge is much shallower there as well).
I agree the more I hear about it the more it makes me think this is soft tissue related. Either way, rest off isn’t necessarily wasting time although it’s frustrating not having answers in the meantime. I hope you get answers ASAP.