Yes dogs can eat white sweet potatoes or any other sweet potatoes.
Sweet potatoes are healthy for dogs as well as humans.
A lot of dog food contains vegetables such as carrots, potatoes, sweet potatoes etc.
The white sweet potatoes is really healthier for the dog than commercially made dog food is.
So if you want to feed your dog some white sweet potatoes or any other sweet potatoes you can do so and they will be just fine.
My dog eats white sweet potatoes, regular potatoes, regular sweet potatoes, carrots etc.