can I use a wii controller with Apple TV?

Wii controllers are not supported at this time.

Connect a wireless game controller to your Apple device - Apple Support

• Xbox wireless controller.

• PlayStation wireless controller.

• MFi®-certified (Made for iPhone, iPad, or iPod touch) Bluetooth controller (e.g. Nimbus+)

Hello,

This section of the Apple TV User Guide discusses pairing different bluetooth controllers with an Apple TV. The second link is from a third party and I have not tested the instructions for accuracy. It also is specifically referencing using a Wii remote as a pointer device (mouse) for a Mac or PC rather than a game controller so even if paired it may not work as you hope.

Connect Bluetooth devices to Apple TV - Apple Support

https://forums.tomsguide.com/faq/use-bluetooth-to-connect-a-wii-remote-to-a-pc.25378/

I hope this helps but am not confident.