Add direct volume
One or two bench sessions rarely gets the chest enough stimulus. Build to 10 to 20 hard sets weekly across flat, incline, and a fly variation so the whole pec is covered.
Your chest likely gets too little direct volume and you press with front delts and triceps instead of driving through the pecs.
A lagging chest usually comes down to low direct volume plus poor mind to muscle connection, so your shoulders and triceps do the pressing. Get to 10 to 20 hard chest sets a week, add incline pressing and flyes to hit the upper and stretched positions, and lower the bar to your chest with a slight stretch before driving back. Feel the pecs squeeze at the top of every rep.
One or two bench sessions rarely gets the chest enough stimulus. Build to 10 to 20 hard sets weekly across flat, incline, and a fly variation so the whole pec is covered.
If bench hits your front delts, your setup is off. Retract and tuck the shoulder blades, keep a slight arch, and lower to the lower chest so the pecs stretch and load rather than the shoulders.
Deep flyes and a controlled bench bottom put the pec under a loaded stretch, which drives growth. Pause briefly at the chest, then think about bringing your elbows together as you press.
Your chest likely gets too little direct volume and you press with front delts and triceps instead of driving through the pecs.