Botched tummy tuck? How can this be fixed? (Photo)

5’7 157 pounds, active, workout m-f plus walk daily. I have two children Gained 50’pounds for both pregnancy and lost it. Had tummy tuck done Oct 2022 and my scar is awful and now I have a dent on my stomach Surgeon will fix issue but not 100% sure if it is the right way or if I should trust it. He suggested liposuction in my back and filling the dent with the fat. And later down the road, correct in the scar. Looking for all opinions on this!