Try googling Cum Holy Grail.. it's a supplement stack - mostly Lecithin, L-Arginine, Pygeum, Ginseng, Maca, Zinc - that some people swear by...
https://thunders.place/male-suppleme...-increase.html
(That's 200 over pages of discussions on the Cum Holy Grail stack!)
I've used it myself and found that it helped for a while, but then again, I'm ah pek already and wank off daily, have a very unhealthy lifestyle of late, so it's back down to a dribble again... Like what many said, stay healthy, don't wank too much, lots of water, kegel exercises (do it while driving or taking transport), are other factors too...