Voiceover voices on Apple Watch series 7

Hey everyone. I posted a week or so ago about voices other than compact ones that you can get for the Apple Watch series 7, as I was looking at purchasing one. I just happened to have been given one yesterday and I was playing around with it, and I managed to somehow get the Irish Siri female voice to work on it. God knows how though. Anyway, I actually wanted to get the American female one. Does anyone know of how I could go about that? I’m still figuring out little things on it, and I’m loving being able to do the ECG and o2 stats. So I’d love it twice as much if I can actually get to install and use the female voice