Several Nintendo games and many third-party games for Nintendo platforms have been made with Unity. Unity is a popular game engine that's known for its versatility and ease of use, which has led to its adoption by many developers, including those developing for Nintendo consoles such as the Nintendo Switch.
Here are a few examples of games made with Unity that are available on Nintendo platforms:
Many independent developers have also chosen Unity when creating games for Nintendo platforms because of its support for cross-platform development. This allows them to develop a game once and deploy it across multiple systems, including the Nintendo Switch, which has opened up opportunities for smaller studios and indie developers.
For the most recent and comprehensive list, checking the Unity Showcase or the Nintendo eShop would provide an updated catalog of Unity-developed games available for Nintendo consoles.
While the above is not an exhaustive list, it gives an idea of the range of Unity-made games playable on Nintendo hardware. As the gaming landscape evolves, more Unity-built titles are likely to be released for Nintendo systems.