DJI Mic 2 Can't Connect to Garage Band

Can anyone help on how should I connect the DJI Mic 2 to my GarageBand? It was already connected to the Mac (I checked from system settings) but when I try to use the input for GarageBand, it was disabled. Here is how it looks:

This is the closest post I find but didn't find any way to solve it yet:

Record level and input grey out in Garage… - Apple Community

Thanks in advance