How can I stream audio thru an iRig stream to an iPhone 11?

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I am using an iPhone as a camera to Zoom a church service. Because of the distance to iPhone, I have tried to use our sound mixer to improve audio.  I am doing this by running a mixer output through an iRig streaming device to the iPhone.  I get no sound to the iPhone.  I know the iRig streaming works because if I speak into the the microphone at the church alter, I can record that sound on the iPhone (using a record app).  But on Zoom, the iPhone will not receive the sound signal. Any suggestions