I think for me it actually involves less pecs, maybe I’m special. Feels like more shoulders and triceps to me.
There was a study done that found that reverse grip bench actually hit the upper pecs (clavicular head) more than any other exercise. For general pec hypertrophy I would do DB bench and flys, I don’t think anything else can hit them more directly, at least for myself. At one point I was doing floor pause DB flys almost to failure and then switching (without rest, and same DBs) to DB floor press, that really hit my pecs hard. I compete in powerlifting, already have big enough pecs, and don’t find that direct pec work increases my bench so I don’t bother with it, but for others it would be worth trying.