damn, 2025 and people still think you need 6 exercises to hit the chest probably...
I mean look at the size of that muscle group, it's tiny
You either have the innervation to have a good upper pec area, then push ups will make it grow

If you don't, you're basically fucked

Same for the shape, you can easily end up with tits and giant areolas like the guys posted on this thread, or get the perfect squarish pecs with no gap inbetween like Arnold