Growing pecs to hide gyno?

I’ve had gyno surgically removed but the surgeon missed some and I can still see my the puffiness. My gf can’t even see the scars and say my chest looks good but she likes fiddling with my nips… and find em interesting.

It’s been soon 3 years since the surgery and I’m not going to do it again. It’s almost non existent and I’m not self conscious about it. But it still pisses me off

Is there a way to make it less noticeable through training? On trt 125mg/week. Dut and some asin when needed