Hi Jordan. You can use 2 USB mics on a PC/Mac yes. I created a video on this recently https://www.thepodcasthost.com/equipment/microphones/can-you-record-with-2-usb-microphones/

One common issue however is that it doesn’t work when you have 2 of the same type of USB mic, so if you don’t already own 2 MV51s, I’d try an MV51 with an MV5, Samson Q2U, or any other model of USB mic.