Autologous fat grafting months after implant placement

I'll be following any answers. I've had a Lat Dorsi and a prophylactic to the other side.
Fat grafting has been suggested for touch ups. I'll probably go ahead.
But first I'm having Knee replacements. One done 4 days ago.
I don't have any tightness that you have. My Lat Dorsi side is firmer, but that is mostly due to the muscle from my back, to under my arm, to the front and over my implant.