The sensor bar provides two points of IR light that the Wiimote can see with a camera in the tip. As your iPhone is not a Wiimote it doesn't have this camera, so there's nothing you can do about it.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
