Im not sure about the wing, it may just be in her genes. However the fluff on the front looks like some other bird pecked off the top layer of feathers and left the second layer behind.
Will it grow back?? We got her off of craigslist and they had lots of drakes but she's not old enough to mate. And they had lots of females.. They do show ducks
Yes it will grow back sometime between now and this spring when she goes through a molt. If they breed their own to show them, then the wing could be a birth defect from them inbreeding which is probably why they sold her.