I also found this, on intervening - could be very useful to you.
https://www.backyardchickens.com/t/644492/help-duck-egg-pipped-internally-3-days-ago-but-no-external-pip-yet#post_8686492
Okay I did find this and you may need to intervene
https://www.backyardchickens.com/t/594278/thread-formerly-known-as-hatch-day-is-today/38130#post_11438072
Post 38138 on this page… wish I had more details...
You could try sending someone a Private Message.
This is the waterfowl hatching thread that may help
https://www.backyardchickens.com/t/491013/goose-incubation-hatching-guide-completed
And I posted a note in the Thread Formerly Known as Hatch Day is Today thread, to see if I can get the attention of hatchers.
Have you looked at the sticky on hatching waterfowl? There are hatchers here - you may want to edit the title of your thread to Need Help Worried about Duckling About to Hatch
If I were a hatcher I would try to help.