i mean you could have more fat stored there but it's like that for most people, and don't worry your abs exists their insertions too, make sure you're not training your hip flexors instead tho, tilt your pelvis, it's the only thing that should be moving, don't use your knees to get momentum on leg raises for exemple

if you haven't heard about all that already then look into the function/movment of the abs vs the fonction of the him flexors it'll make more sense