Not sure what treatment I could best benefit from. I have stomach fat along with stretch marks

What you need is a lipoabdominoplasty which combines both liposuction with skin tightening in a single surgery. Please consider a virtual consultation with a high definition body contouring specialist to see what can be done for you.

After kids, you can have a fat issue, a muscle issue, and or a skin issue. Fat is treated with lipo, muscle and skin with tummy tuck. If your skin folds when you bend over or sit, a tummy tuck can fix this as well as remove all the stretch marks from at least below your belly button. See a BC Plastic Surgeon, even virtually, and get the advice you need.

You did not post photos, so I cannot be specific. However, liposuction can remove excess fat. If you have some loose skin, radiofrequency skin tightening with Renuvion can work well. If you have a fair amount of skin, an tummy tuck might be needed.