Cyclone 10 GX development kit USB 2.0 PHY/Microcontroller function?

I am trying to understand what function the USB 2.0 PHY (CY7C68013A-56LTXC) on the Cyclone 10 GX development board is providing. More specifically since this device also contains a programmable microcontroller I am looking for any information on what this is programmed to do on the development board or source code if it is available.

Thank you