Persistent soreness is muscle strain and cannot be directly linked to the effect. It will appear at the beginning of exercise or after a long period of non-practice. Your situation only shows that your chest muscles have adapted to this intensity and recovered their muscle speed, but it does not mean that there is no pain, so it has no effect. You should not gain weight without muscles that are not sore.
The way to judge whether it is effective is to use that muscle hard after exercise, which will lead to obvious powerlessness and pain. This situation shows that your exercise is effective and your muscles are tired.
Exercise can't be done in a day or two. It should be done step by step, once a week, and it is good to adjust the training movements, not so frequently. . . .
Understand?