There's a lack of awareness too - I saw three orthopedic surgeons and one neurologist and none asked me about, mentioned, or tested me for Thoracic Outlet Syndr

There's a lack of awareness too - I saw three orthopedic surgeons and one neurologist and none asked me about, mentioned, or tested me for Thoracic Outlet Syndrome (which is likely what you had based on what fixed your symptoms). I only learned about TOS myself after they ruled out Carpal Tunnel Syndrome and going back to Google to try to find what could be causing CTS symptoms other than CTS.