Please be aware that some Mikrotik devices use the USB-C connector for power but are not PD (Power Delivery) compatible (and they don’t even use the - passive - scheme that allows 3A@5V on USB-C), see here:
http://forum.mikrotik.com/t/hap-ax-lite-usb-power/172612/1
Thus YMMV (you will need to use the USB-A port or some circuitry to be able to “pull” the 3A@5V).