Yep, totally normal! In fact, you might not see her moving around much at all - that's how ball pythons like to do things, and more than that, if it's during the day time, she's probably sleeping. I like to leave mine alone for ~48 hours after they eat. If she's still, she's feeling comfy, so no need to worry. Balls are not active snakes, although some will lurk around at night.