Yes, Moms will take care of them the best they can, I am very protective probably overly I only let my Musvcovy hatch small clutches so I like to make sure they all survive.
Explain your pond. The dangers are snapping turtles, flying predators even snakes at the age the ducklings are. Mamas have been doing this forever and many lose their whole hatchs, ponds can be fun and dangerous at the same time. If your worried keep mama and ducklings up till they are 3-4 weeks...