Cs, no, we don’t daven that the whole world will know moshiach. He is a vehicle for the world knowing Hashem. We daven all the time that the world will know Hashem – we don’t say to Hashem that he should send moshiach in order that they all know who moshiach is; maybe that’s what chabad does, but it’s very twisted.
Where in any of our tefilos do we pine for the world to know moshiach? We want moshiach SO THAT people will know Hashem!