Should you get in the best shape before BBL and tummy tuck surgeries?

I’m 5’1 and currently 160 pounds. I know that I need to loose about like 10 or 20 pounds. I’m going to be working with a dietitian. I’m pretty sure that if I am a candidate, I want to get two rounds of BBL and a tummy tuck. Is it best to get into really good shape before surgery? (gain as much muscle as you can and get as lean as you can.)