Honest question will chest exercises make my boobs small

I’m working out and I’ve heard chest exercises can help make them look bigger yet I heard they get smaller and/or they get smaller before the muscle grows. I’m very flat chested already and I can already notice my boobs looking flatter 😭 I kinda knew with losing weight this wouldve happen but not to this extend😣 I don’t want to lose what little lumps of boobs I have but I also don’t know if it’s bad to cut out chest exercises mainly chest isolation ones oooor is it because I have just lost weight ?