Revelation also to the Gentiles?

I don't know what "in Judaism" means. There are very few Torah sources that are considered consensus and everyone agrees on them. There are many opinions and approaches from different people. For example, Rabbi Kook, in his book The Confusions of the Generation, raises the possibility that religious revelations to Christians and Muslims did exist and that they were assigned their own missions. But as mentioned, there are many approaches and opinions. There are, of course, divine revelations to the Gentiles in the Torah itself. Adam the First, Balaam, Pharaoh, and more. I assume you mean the revelation of the giving of a new religion, but this is probably something almost no one will recognize, since the revelation at Mount Sinai is also addressed to the Gentiles. Although there is a difference in the role (in the number of commandments) imposed on them, this is also true within Judaism between priests and non-priests. Beyond that, animals also have a role for which they were created. You could perhaps say that their role is to serve creation or humanity (and opinions differ on that too), but this is also true for each of us, Gentiles and Jews. The difference is only in the nature of the service required of each. I think a more logical way to look at it is to talk about the purpose of creation for all of humanity, or even the universe, rather than for an individual person. This greater purpose is served by everyone in their own way and mission. As mentioned, there are many possibilities.