Sometimes, the issue lies in the graphics processing unit (GPU) emulation; lowering the internal resolution or changing the backend from DirectX to OpenGL (or vice versa) can resolve latency issues and create a more responsive experience. Since you are using a PC, there is no physical infrared bar to detect.
Use Wii Remote As Game Controller Dolphin: Step-by-Step Setup Guide
In Dolphin, navigate to the controller settings and select the option to scan for new devices. You can do this by pressing the red sync button located behind the battery cover.
Enabling this allows the Wii Remote to calculate the position on the screen based on your mouse movements, effectively replacing the hardware requirement. This requires a Bluetooth adapter capable of handling the Classic Controller protocol if you are not using a Wii U Pro Controller.
Use Wii Remote As Game Controller Dolphin: Step-by-Step Setup Guide
For GameCube titles, you typically map the remote to act as a standard controller, assigning A, B, and the directional pad to the appropriate physical buttons. Windows often ships with generic drivers, but for better reliability, especially with the Bluetooth stack used by Dolphin, installing the Toshiba Bluetooth Stack is highly recommended.
More About How to use wii remote on dolphin
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