I can mostly feel that on pyramid hips (on flat with old man legs is harder) but the more actual ollie action you will put into the pop, the more you'll be able to just suck your feet up and have the board come up along with them if that makes sense. Basically don't think of the scoop as something sideways and have it all be in the foot positioning, toes on the right pressure points, I know I lodge my front foot deeper and closer to the center of my board when I'm using the momentum of a bank to get height (pyramids again). Then once in place all you should have to do is pop straight down and literally just ollie, then just the ollie motion (dragging your foot up) combined with the flick at top should form the trick. You want to form it on your way up and catch it at the peak if not earlier (that's really talking ideally) even if that means sort of shiftying it on occasion. Aim for a brutal vertical spring, bring your knees up, think strong smack and rebound of the tail to then redirect by sort of flinging upwards. You kind of want a quick flip as well which is why on some good ones sometimes the board barely seems to really flip and looks like it barely detaches from the front foot (which doesn't mean you now have to be silly with your back foot).
This is probably especially valid for popping 360 flips over something by the way, maybe not into grinds, I've never tried that.