Koleke, Forteo had a black box warning about the possiblility of bone cancer. Patients who had prior radiation treatment were considered at additional risk. The black box has been removed as twenty plus years of clinical and real world trials have disproven the risk.
I had intense radiation and have been on Forteo for nine months.
https://www.rtihs.org/updates-and-events/forteor-post-market-osteosarcoma-surveillance-program-real-world-data
The defunct warning includes Tymlos, so if it isn't Evenity would you be on a bisphosphonate?
It's possible that your PA isn't aware of the change, but you might ask because he would want to know.

I also wanted to go on Forteo but cannot because of radiation. I am going to try Evenity. My Dr said people have good results. I haven't been able to build bone natural ways. It is scary to go on Evenity but osteoporosis is scary too.