If they haven’t broken the membrane on their own, I’m sorry to say you assisted too soon. Normally if they don’t break the membrane on their own, they either aren’t close to hatching, or they’ve died.
Try holding your finger gently on the membrane, you should be able to feel movement. Or you should be able to see if they are breathing. Maybe get another for pic for us to see how they look now.
Call ducks are notorious for dying in the last couple of days before hatching, so don’t feel like you did anything wrong. Unfortunately, it’s just a fact of hatching calls. Also assisting is a slow, gradual, excruciating process most times. Timing is everything.
I sure hope you get a few to hatch.