Not the Nintendo I grew up with, with the Wii and Wii U.

A phone number to use vice chat on switch what is this Twitter 2.0?

sources: https://www.theshortcut.com/p/nintendo-switch-2-gamechat-only-works-if-you-register-your-mobile-number

https://www.indy100.com/gaming/nintendo-switch-2-gamechat-requirements-phone-number