I suspect you are training for L-3 and need this parlor trick in your dog-n-pony show. It truely is a learned "trick" because so many artifical things must be hoogled to make it look pretty.
So that said: Reach as far downhill as possible with a strong pole plant that is timed to your edge-set landing. This will allow you an extended base of support downhill of your edges and allow you to get your upper body further out over, even past, your feet. This will allow you to create (artificially) more edge angle so that the skis reverse camber a least a little for some trampoline effect. Make sure your landing edge-set thru take-off is a smooth continous plyometric movement. Direct your launch out-and-around the planted pole. Do not land, pause, and then take-off or it is even more work.
While an already skilled skier can learn the above with some practice and rehersal, Most students not only cannot, but will not spend the time to learn them. So, from a practical application (not artifical exam) perspective I got to ask: Why practice movemets in a "pretend" situation if those movements do not accuratly reflect those used and required in a "real" situation?
The "hop turn task" that is done on flatter terrain is as unrelated to the actual functional use of a hop turn in a real skiing situation as any two similar appearing activities can be.
If you want to learn to do them so they are actually useful, learn to do them on steep terrain.
In the phony version on flat terrain the only direction you can functionally jump is up (vertical). The dangerious experience too many skiers have trying to do this on steep terrain (when their safety depends on it) is that they cannot jump vertical far enough so the tails of their skis won't get caught on the slope uphill behind them. They wind up landing half-way around pointed dead down the falline and way in the back seat. Exactly what the wanted to avoid! And they are confused as to why trying that hop turn thing their instructor taught them on the flats so they would be safe on the steeps actually made thing worse?
In a real situation on steep terrain you jump "out and away" from slope, not "up" vertically from it. This aligns the body axis more perpendicular to the slope so the skis can be cleanly pivoted parallel to the slope. The gravity to slope relationship of steep terrain cannot be replicated on flat terrain.
On flat terrain the skis land on a minimal edge angle and cannot create any signifigant reverse camber trampoline effect that comes so easily on steeper terrain because of the built-in edge angle between the slope and vertical. So instead of learning to use ski technology with finesse and accuracy, you learn to be physically crude and imprecise, that last thing you should aspire to on the steeps.
This in a prime example of a pretty usless, even negative, task that use of reflects a lack of awareness of what to practice, or why, and how to apply it.