A very bad TOS flare can cause muscle spasms, trigger points and might have caused your top rib to get raised up and maybe stuck in the raised position..

Did any of the PTs ever check for top rib location or do any rib mobilizations?

Some really good chiropractors can do muscle work as well as adjusting - top rib adjusting too... shoulder etc any joint, but some are better than others..same for PTs and drs...

My chiro used something called NIMMO which is a like mix of trigger point and deep tissue release..plus he used ultrasound , IF stim, low level laser... all these things & the top rib mob helped me recover from very severe flare..

I had blurry vision, whooshing and very watery eyes for a log time til I saw my chiro, he also did a upper c1 c2 adjusting.. it took a few months to get past the worst but the PTs would have taken a lot longer..