Are there any lower pectoral exercises that do not require a decline bench press?
Weighted dips are an excellent compound exercise that directs a lot of the overload towards the lower chest.
All you need to do them are parallel dip bars and a belt you can hang weights from to supply additional resistance.
When doing dips for your chest you want to make sure you lean your upper body into the movement as you lower yourself. You’ll feel a good stretch across your entire chest in the down position before you power yourself back to the top.
I’m sure you’ll find weighted dips to be a great alternative to decline benching exercises for pecs.