Well, I did not have one focal target either - PSMA totally negative. But it has become standard to irradiate the prostate bed - and more recently to include the pelvic lymph nodes - in salvage radiation (usually in conjunction with ADT). These are the two areas in which rogue PCa cells are probably living. The success rate is very high.
I have never heard of being put on ADT with no type of radiation whatsoever after surgery; unless radiation was your primary form of treatment. Very unusual to me.