Can’t be pipped internally, if that is the end of the egg opposite from the air cell. Did I read that correctly?
That is quite a bit of clear fluid, glad you still see movement. They have a few days to go, so hopefully they will absorb more of that.
But I expect you will have a really gooey hatch. If that stuff doesn’t disappear, it will come out with the duckling, and it’s super sticky and hardens like glue! It’s not a death sentence, but when they hatch, you might have to clean the face/eyes and beak. You don’t want that stuff to clog the nostrils especially. The goo on the body is not as critical to clean quickly, but it’s awful on the head and face, so best to get washed off fairly soon after hatch. I use a warm, damp paper towel, or cotton ball, etc. Even a soft toothbrush can be helpful
I would also recommend propping up the air cell end of the egg for the rest of the time. It will encourage the duckling to turn toward the air cell, and stay away from that goo.
Good luck!