I haven't ever had a flat stomach, surely it's not just genetic?
Mine is well rounded! After belly button (top half is mostly flat).
I'm not overweight, around 170cm and 60kgs.
I've been working on abs, some definition (mostly in the mornings only), I have a strong core but still have a fat stomach, more lower half. I walk/gym/cycle several times a week. Eat mostly healthy.
I find carbs, bread and pasta especially make me more bloated, though it can be most foods, simply after I've eaten any meal.
How do people do it? (Also late 30s and have had children)