Connection options 2 monitors with BML-C Multiport USB docking station:

1) HDMI to your PC, and HDMI-C Multiport USB docking station
2) HDMI to your PC, and VGA output on the USB-C multiport docking station L

When you connect the monitor through a docking station with USB-C, the computer automatically disconnects the built-in analog video outputs (VGA) that are connected directly to the computer.