As long as your cat is healthy, eating her dry food just fine, and doesn't require a soft food diet then I wouldn't worry about it.

Some cats just don't like canned food, while it does contain more water than dry, it does tend cause more teeth problems later on in life.

Mine only get about 1 teaspoon or less of canned food a day because of medicine that one has to have and it's easier just to give a bit of it to all of them. Of my 7 cats, Sassy doesn't really care for the canned food, but her brother Josh seems to relish eating up her share. LOL