Dr Michael Lewiecki stated in an interview that he had one patient who finished Evenity and then did Tymlos and continued to gain bone. There was some reason that I forget they couldn't do the anti-resorptive options at that time so they chose to use Tymlos and it worked. This was from a Dec 23 interview of the doctor by Lani Simpson. I believe it's behind a paywall as it was part of Lani's weekly Master Class which you have to pay to join. Lani's weekly programs are useful.
BTW, I also tried unsuccessfully finding any other info showing whether Forteo or Tymlos could be used to gain more bone. I would like to do that if possible.