Hey @tj1967 ,
I don't have the knowledge some of these other folks have, but I'll give you my experience in a timeline....
09/02/21 Radical Prostatectomy -
10/22/21 PSA Result of < 0.1
01/26/22 PSA Result of 0.039
04/26/22 PSA Result of 0.091

My mind went to "hitting it hard to lower long term risk" so I did two years of ADT and SRT (39 treatments). These treatments were somwhere in the neighborhood of 30 to the prostate bed and glands then the last 9 ish to the prostate bed alone.
Some will say I may have started too early on the second round of treatment, I certainly understand that opinion.
Not everyone thinks the same, you have to do what is right for you! I'm a "Give me all ya got doc!" type.

Treatment ended 8/12/22.
Then it went to ....
08/17/22 PSA Result of 0.014
11/28/22 PSA Result of < 0.006
...and been that way ever since.

I don't think I have any permanent side effects from the salvage therapies, yet anyway. Anything I have came from the RARP. There are certainly side effects to be dealt with during the srt, but in my case they mostly ended within 6 mos of stopping the relugolix. I still have the occaisional hot flash but it's certainly manageable.

....and of course, it could start climbing tomorrow...I've been called a pessimist, I'm a realist!! LOL

Best of luck to you!