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Yup, all visible. The only exceptions are fully private instances (or mostly private, with limited federation) and local only communities.
kbin/mbin also make all these votes public, so you could even just be on an mbin server and see all the votes. So right now its like… jumping over an 8" high hurdle. Or doing the limbo under a pole at 5’. You have to do something, just not much. I wouldn’t call it completely non-trivial to do, but it isn’t rocket surgery either.