My advice is to steer well clear of surgery!
I was diagnosed with AS last July '22 after 30+ years of neck and shoulder pain.
I had seen about a dozen orthopedic surgeons during this time without one of them suggesting seeing a rheumatologist. So much so, in 2002, I had fusion surgery to C5/C6 which was horrible and lead to complications (DVT & PE).
A year later, I was still having the same problems and went back to the surgeon who suggested I need the same op on C6/C7!
I ran out of there quicker than Usaine Bolt!
Suffice to say, I continued having terrible flairs and also saw numerous physios, chiropractors and consultants who never even mentioned AS!
Now I'm on biologics which are 'slowly' improving my day to day life. I've come to realise, my pain won't go entirely but with the injections and daily physio/stretching it will make life much more manageable. The fact is.... there is no cure for AS so we have to deal with it!