n0m re Avirah’s claim that we don’t daven that the whole world will know Mashiach: “I do. 15th bracha of the Amidah. V’karno Tarum”
I don’t see how that means that the whole world will know Mashiach. It means, as far as understand the simple meaning, that we daven that Dovid Hamelech’s pride/fame will be uplifted (when Mashiach comes). There is not meantion of the whole world knowing it.
When Mashiach comes the whole world will indeed acknowledge him, as this is one of the Rambam’s criteria, but I don’t see where we pray for that result.