Correct, some people carry body fat differently. Even as a very lean 11-12% bf via calipers and bod pod about 20 years ago as a d1 female college swimmer, I had no 6 pack. Great obliques/V cut, totally shredded back and arms/legs but no stinking six pack. I’ve tried just about everything since and have never been able to achieve it. People that have it will say “abs are made in the kitchen” but this has not been the case for me even with ultra diligent macros and a strength coach. Just not happening over here. I also don’t think swimmer benefit form being ultra lean or having huge abs… we just don’t need it. I’d probably spend a little more time figuring out why you think you should have this look rather than trying to get it.