My case study is amazingly similar; i.e. Gleason 9, Orgovyx nearing 9 months, 5 weeks/ 25 fractions- IMRT PROSTATE RADIATION and no metastasis. I am 2 months post radiation.
Orgovyx side effects have been mostly hot flashes that have now greatly subsided.
I had a sigmoid colon resection more than 2-1/2 years ago followed by a year of diarrhea. Now since radiation, the diarrhea has returned.
I am sure that my testosterone is non-existent. My testes have shrunk and erections are not happening ever. I don't even think about it anymore. I guess having no spouse to consider makes that easier.
I am 75. Not too active other than household chores and running errands to shop. I don't have a lot of energy and can sleep anytime day or night.
So overall, and by comparison to most others, I am doing pretty good. My concerns are the eventual return of colon cancer and the metastasis of my prostate cancer. It's all very worrisome.

I am curious as to the causes of the sacrum fractures? I assume that it is not trauma related?

I really want to say that your post was of great interest to me in terms of my own similarities.
But primarily, I do pray that your husband will see great improvement in all ways, including pain relief and increased mobility!
Blessings to both of you!!
PAUL