If USB microphones don't power on, you'll need a powered USB hub. MXL has no affiliation with VB Audio and this software is used for example purposes only.
In this example, we use VB Audio's Voicemeeter which is free, but donation based. You will need a virtual mixer to sum together your multiple hardware inputs. Below are instructions for connecting multiple MXL USB microphones to your Mac or PC for use with Zoom or other video conferencing and streaming software.