Have you googled Silver Appleyards?
Our rouens are darker in color. And they don't have dark blue bills. It could be a mix of welsh/rouen. But that coat looks lighter, more like an Appleyard.
Rouenhttps://www.purelypoultry.com/images/ducks/rouen-ducks.jpg
Silver Appleyard...
She looks more like an Silver Appleyard. Both of your ladies are very lovely. And Yes, our dominant hen duck will mount the other ladies if she wants the drake to herself. Maybe she is half SA, half Welsh.. love that duck bill!
Edit because apparently I can be dyslexic lol