The latest update released by Nintendo confirmed that the Nintendo Switch Lite outsold the Nintendo 3DS, and quite possibly the Wii U as well.
The Nintendo Switch Lite has sold 13.53 million units as of December 31, 2020, while the Wii U has sold 13.56 million units in its whole lifetime.
This means that it is safe to assume that the Nintendo Switch Lite has outsold the Wii U by taking into account the sales made in January 2021.
