Large hematoma after fall on butt. Fat Necrosis / Scar Adhesions - is surgery necessary? (Photos)

Fell on my butt about a year ago, developed a large hematoma, that has since resolved but unfortunately left behind fat necrosis & scar adhesion causing a slight indent/ahelf on my leftt buttock. Im self conscious aboutt it and my plastic surgeon is recommending a BBL to smooth it out. I've recently started working out, weights etc. My question is, is there a chance just building muscle will help make it less noticeable to where I could avoid surgery? I'd really like to use that money elsewhere, but want this to be better. Everyone else says you can't notice it, but obviously I do.