PSA Rise After ADT

I've been posting and following a few months now. I was stage 4a, Gleason 9, Decipher .99.

I've had prostatectomy, followed by radiation and ADT (Orgovyx) I was on ADT for 2 1/2 years total-- for 26 months after radiation. MY PSA has been undetectable (< 0.01) for this entire 26 months.

My Drs wanted me off ADT and I stopped the Orgovyx in July. I've got my first labs since then coming up tomorrow. My question is this-- if and when it should start to occur, how long do I wait for my PSA to go up-- do I wait the usual until .1 or .2? It seems to me there's no reason for that approach. My PSA has been < 0.01 for over 2 years so if it starts to go up now even just a little bit, that's a sure sign that something is going on. Why wait?

What's your experience-- if PSA starts to rise after surgery+ radiation+ADT, what are the best treatment options?