Hola,
I’m a native Spanish speaker from Spain (I live in the U.S., spoke English all my life with a native English speaking father and my English could be better than my Spanish). Since I am Spanish, we use vosotros. While I heard people in the U.S. learn “ustedes comen”, I would say “vosotros coméis”.
Over 20 years ago when I was in high school its was taught slightly. I think it was just to make us aware of it. But we did not focus on it at all if I remember correctly.