Our AWD systems are 90/10 bias until more power is needed in the rear.
If you really want to check if the status of the AWD on a lift, put the lever into 1 & 2.
(Don't know why I'm telling you to test the AWD system without a load since that's bad.)
Those gears are effectively 4x4 & all tires should spin equally.
Usually when our systems have a problem, they'll slowly or quickly bind.
If you're driving it in AWD on the road & nothing feels like it's slipping or binding, you're good.