Re testesterone, I was on Zoladex for 3 yrs with last implant June 2018 or thereabouts. Like you libido was non existent but that was expected along with many other effects. In June 2020, i.e. 2yrs after last implant, my testesterone was 20.4 classed as normal. Not long prior to that I'd say it was still much lower and things seemed to respond quite suddenly. My PSA nadir was 0.5 and has remained there or bit lower since. I was also on 2yrs abiraterone, enzalutimide, prednisolone on trial, p!us 32 sessions RT.
I obviously dont know if zoladex/prostap etc recovery is at same rate. I do know its been said many times that recovery from HT takes as long as on it; for me that was about right, still suffered tiredness etc (not to same extent)after testosterone normal.
Peter