Tripp LiteUSB C Active Extension Cable USB C to USB C USB 3.1 Gen 1 M/F 5M (U330-05M-C2C)

Is this supposed to work for passing audio and video from a laptop to a dock? I can only get it to work with an external flash drive. Thanks.

What Power supply does it use. Bought and seen that It doesn’t come with one?

How many amps maximum does this cable support when using a power supply?

Can i use one of these to power an audio interface(usb-c) that doesn't get enough power from the native usb-a port?