Lighten and slow down
Heavy loads recruit whatever muscles get the weight moving, often the wrong ones. Reduce the weight, control the eccentric over 2 to 3 seconds, and stop the momentum so the target muscle stays under tension the whole rep.
You likely use too much weight and momentum, so stronger muscles take over from the one you want to feel.
Not feeling the target muscle usually means the load is too heavy and other muscles are helping, or your setup lets you cheat the rep. Drop the weight, slow the lowering phase to 2 to 3 seconds, and pause in the stretched position to force the target muscle to do the work. A few light warm-up sets where you deliberately squeeze the muscle also improve the connection over time.
Heavy loads recruit whatever muscles get the weight moving, often the wrong ones. Reduce the weight, control the eccentric over 2 to 3 seconds, and stop the momentum so the target muscle stays under tension the whole rep.
The muscle you want should be the one that is stretched and shortened by the movement. Make sure the exercise takes the target muscle through a full range, and pause in the lengthened position where the stretch is strongest.
The mind-muscle link improves with practice, especially on smaller muscles like delts, biceps, and glutes. Do a couple of light sets focusing purely on squeezing the target muscle before your working sets.
You likely use too much weight and momentum, so stronger muscles take over from the one you want to feel.