How to set up Lavalier mics with iPhone 16 Pro?

Hi, Colleagues! In my vlogging I strongly need to record two separate mic to two mono channels. But when I connect wireless receiver to iPhone 16 Pro usb-c, I have mix of two mic on both channels ((( I’m using Blackmagic camera app and dual mono in settings… I need another wireless mic or this is Apple issue? Need help! Thanks! 

[Re-Titled by Moderator]