EBRT and ADT penis size

I had 33 rounds of EBRT and 18 months of Firmagon and Ellegard. PSA 44 gleason 9's and 7's, Onocologist was certain that my cancer metastasized. However, had a negative PMSA scan. Since I still have my prostate, although unfunctional, will my penis and testicles ever go back to normal size? Also will I be able to have a solid erection. Prior to all the treatment I had no sexual performance problems. Now with half the size and half erect I still have acceptable orgasms. 64 year good health.
Thanks in advance