A:Answer Testing it with a Mac usb charger and MacBook, it cannot pass power through the USB-C.
It has two ports, which can allow power and video to be passed individually (e.g. when source does not provide power like a HDMI converter).
Reddit comments make me believe it can provide video passthrough though, so you could daisy chain another monitor, but it would need to have it's own power source.
I will try with a USB-C dock/dongle as I only have one port.