Just a comment on my experience, though I’m not sure it will be applicable to yours, but just in case it helps.
I will openly admit I have very little knowledge of spinal degeneration.
The sum total of my experience is;
At around age15, my dad told me that is what he had that had made his back sore from pretty much the time of my birth.
I had back problems on and off that seemed to be resistant (or even exacerbated) by treatment then would suddenly resolve
My onset of PsA at 36 started with back pain and stiffness that couldn’t be helped with physio and kept getting worse
Within 6 weeks of onset of PsA (at this stage I still didn’t know what “it” was, so the following experience terrified me), I lost power in my legs and my feet and lower legs went numb. The Physio thought these were symptoms typical of stenosis.
Xrays identified degeneration but not stenosis. Almost all people over 50 years of age show degeneration
Oral steroids completely resolved the symptoms (though obviously not the degeneration seen on X-ray)
I subsequently realised my dad had untreated PsA (despite agreeing with my conclusions, and remaking that his doctor has said as much 15 years earlier, he had refused treatment due to mental illness, and certainly paid the price for that later in life, including dying quite young, at 65).
I have had ups and downs in treatment, but have never returned to the level I was, at my worst before treatment.
Whilst I’m sure your situation is different, I think it is really wise of you to try to get treatment from the Rhuem first, to determine how much of the issues are being caused by inflammation overlying the degeneration, because imaging rarely reflects pain or disability.
And, whilst that was all a bit of a clinical, dry overview, I wanted to let you know there is hope. I chose a different path to my dad, and I am at a very different olace in life than he was at my age.