@jacjac
evenity isn't FDA approved for men. There is off-label use, so your husband could get Evenity if he can find a agile physician. There is a study of starting Evenity three months after the Prolia injection, with a return to Prolia. Risedronate isn't considered strong enough to combat Prolia rebound, so a curious choice. And, probably, a save that your husband refused to tolerate side effects. I think I'd move to find an agreeable physician. Even though it is another curious choice since Evenity basically builds the same type of bone.
The most usual choice after Prolia is Reclast infusion. It is the strongest bisphosphonate and avoids some of the oral and digestive side effects. He could use Zometa infusions. It is the same drug as Reclast, but in smaller doses and usually given more frequently. Maybe a second opinion from a different endocrinologist.
I have read that Prolia concurrently with Forteo yields better bone than either alone. If the helpful surgeon would order Forteo you might have an answer. https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2022.888208/full
The trouble with thin bone and revision surgery is the both the weakness in that bone and the failure of hardware to integrate with bone. Forteo is the one medication known to increase that integration and to increase the fixation strength of the screws.