I just subscribed here and saw your post, I don't know if your prostate is operated on but I'll try to give you my point of view if it helps. I had a robot assisted total prostatectomy 2 years ago and this issue worried me a lot before the surgery.
The dry orgasm is very surprising and very weird at the beginning, I obviously don't have the pleasant feeling of tension and of semen rising in my penis at the beginning, just before when we say "oh yes it comes", there it is It's more like a slight tingling and then my penis will start pumping rhythmically like before. The reflex is very present and the spasms are as numerous and powerful as before, the fact that there is no liquid passing through the urethra takes away a lot of sensation.
The fact of not seeing the semen squirt from my penis takes away from the quality of the experience but it is the new reality for us men who no longer have a prostate. The only positive aspect is that there is no big mess to clean up after the fun time.