Nintendo Support has published a page for a unspecified Wii Remote accessory for the Nintendo Switch 2. We have already had GameCube games on the Nintendo Classics service, so Wii is likely the next candidate. Of course this could just future planning as the support page itself is naturally devoid of any details regarding the currently unannounced peripheral.
Nintendo Support has a page for a Wii Remote for the Nintendo Switch 2

Inclusing a Usb-based sensor bar?
Hold on they might be cooking here omg…
The sensor bar could just be battery operated. You could literally light candles near your TV for the Wii as a makeshift sensor bar.
So Wii is on its way to NSO, Yes!!! Twilight princess will be the first title! 😁
Also just in time for Wii’s 20th anniversary at the end of this year! 😁
While this would be fantastic news, I heard somewhere that this was a glitch in the website (of some nature I’m not familiar with), that essentially lets you combine and jumble entries to end up att basically any combination of things you want.
According to what I read, you can also find a page for “Virtual Boy Web Browser” which is clearly something Nintendo is not planning.
While an exciting concept. They also have a page for the Wii controller on 3DS so this is clearly a glitch.
Watch Nintendo charge $80 for a Wiimote
Apparently it’s a glitch of sorts.
I have a feeling if this ever were to happen the Switch 2 would be the sensor bar hence why it peeks out of the dock.