You may have to start over with new chicken breeds.
It should not be hard to rehome your hens. Some folk would absouletly love to get a broody.
I found a list of non-broody chickens for you.
https://www.citygirlchickens.com/non_broody_chickens.html
Some breeds of hens have the brooding trait bred out. Like leghorns. You will have better luck with certain breeds of chickens if your main objective is eggs.
Your americana and your orphington are known as great broody moms. Never had welsomers myself.