3 elevated PSA tests suggest biochemical recurrence (BCR). And your risk factors post surgery are noteworthy.
My suggestion would be to consult a Radiation Oncologist and/or a Medical Oncologist.
I had Gleason 9 w/ Extraprostatic Extension (EPE) postop pathology following very successful surgery at Johns Hopkins. However, persistent PSA .19 & .18 90 and 120 days postop.
Referred to Radiation Oncologist for salvage treatment of radiation to the whole pelvic floor region (WPRT) and pelvic lymph nodes together with 4 mos ADT. See SPPORT trial.
There is a Jan 2023 video on patient resources tab from the Prostate Cancer Foundation pcf.org on rising PSA following initial treatment.
My understanding is. 2 - .4/.5 is the "sweet spot " for salvage treatment. Also, 2 friends treated similarly postop.
My PSA has been undetectable < .02 for about 1 yr since completion of Salvage Treatment. Very happy and hopeful.
Best wishes.