Resolved! STM32U575I-EV - This eval board is supposed to source power to the USB-C connection but as far as I can tell, my board does not. Are there additional configuration steps I need to take for the board to source USB power?
I am using the UX_Host_MSC example project. When a connect a USB drive to the USB-C port, the demo app detects a physical connection but power is never activated.