When will xbox one be supported in Uruguay?

Not sure Uruguay is a Live supported region. If it isn't in the list when you create an account it isn't available in your region.

Hello Rafael,

Thanks for posting on the Xbox forums. We understand that you are interested in learning when Xbox Game Pass will be available in Uruguay. Uruguay does not appear to be on
the list of countries/regions where Live services are supported. There is no current update on which countries/regions will be added to the list. We suggest keeping an eye on the
list. We hope this information helps Rafael!

Xbox live isn't alowed in uruguay? i remember having it for xbox one

The alternative is buy gift cards and use them to subscribe the gamepass and other xbox one game/content. In while you can also give the idea for that addition using
Xbox Uservoice.

The problem is that in Uruguay there are no such cards, the only method we have is to pay through internet. I had planned to buy the Game pass from my Xbox, but as it is not possible I tried to see a website that I trust but they are all sold out.