Wii Balance Board
Used for various fitness games on the Nintendo Wii the most famous being
Steam Input support
Linux Kernel Support
Yes, since 3.1 -
RetroDECK: Sync Wiimote Button Hotkey
RetroDECK has a built-in hotkey for pressing the Dolphins
Sync Wiimote button
Alt + W if you find yourself disconnected.
It can also be accessed from some controllers radial menu systems on for example the Steam Deck.
How to configure in Dolphin