some people find it natural - others do not. there can be a bunch of reasons why not...
sometimes people have the wrong conception of what they are trying to do... and sometimes they have a mobility restriction that is preventing them.
with respect to what you are trying to do...
you want to sit your torso down between your legs rather than sitting your butt back. if you sit your butt back then you will fall on your ass because your center of gravity will have shifted back behind your midfoot. if you sit your butt back then one way you can prevent yourself falling on your ass is to hunch yourself forwards. it will depend on your lever lengths how much sitting back / forwards lean you need to remain balanced.
so if you think of it as sitting yourself down between your legs letting your knees drift forwards in front of your toes however much they need to in order to keep your balance over your midfoot (allowing your torso to remain more upright)... some people find they lack the ankle dorsiflexion for their knees to come forwards as much as they need to (more for longer femurs).
one fix is to adopt a wider stance so the knees can drift more out to the sides. another fix is to come up on the ball of your feet a little. another fix is to give yourself some heel raise which allows you to keep your weight on your heels without coming forwards on your toes.
some people find they lack the hip mobility to lower their torso between their legs. they sit their butt back because they can't open their hips enough to sit their ass down between them.
one point of difference between an asian squat and a weighted squat is that in a weighted squat you need to keep your spine in a neutral position to keep your back safe under load whereas the point of an asian squat is to relax so one is allowed to hunch forwards to keep ones balance.
the asian squat can be good for getting nice mobility in the ankles / hips that is helpful for loaded styles of squatting... but one will need to work on recruitment in order to maintain a properly tight position under a load - and one will need to hold ones back a little differently.