New dashboard update on xbox?

Heard there's a new dashboard system, it is already the case with my friend, the new dashboard system has been around for 2 months but for me it is still the old why? And how do I get the new one

Think that's called the Xbox Inside program. You can participate in this voluntarily and thus test updates before the official appearance.

If I'm not mistaken, the registration went through the website or the app of the same name in the store.

But you could have just asked your buddy.