LMG Development Pathway, page-98

I have been think about this for a long time. But what is stopping them from building a 30k or even bigger flyash plant in the USA they have made a lot of post about mg being a critical minerals in the USA. And they have also talked about high demand. So wouldn’t it be more simple to have a plant in the USA? By doing so wouldn’t it also allow for USA grants so would be a cheaper plant to build? USA have been mining and burning coal for a long time in gussing brown coal.
just what I’m thinking and wondering why has not been talked about correct me if I’m wrong.