Hello. Nice to see you.
Big congrats on the weight loss. That's really fantastic!!
Did you start lifting at the end of this process/ after the weight loss?
You can certainly start building muscle back there. Are you looking for specific advice about exercises? What do you have available in terms of equipment? Time?
Also, you'd benefit from trying to gain muscle wherever you can, just to try to compensate for the drop in metabolism that tends to accompany dramatic weight loss.
About genetics, it's too bad we can't choose where we keep fat, and where we loose it. The same with muscle fiber types/ roundness of muscle bellies/ insertion points.
Not that we can't all improve from where we're at! You're well on your way.