Not a specific input but it has a "USB C PD 3.0 Charging Port". I guess the idea is the hub is plugged directly to mains power, then plug the laptop into the hub via that port? Not sure if this would only do power and not data as it also has a USB-C data port. It's a Zmuipng ZM1822 with the expected smattering of Engrish in the little booklet with it.
Yeah I guessed right. You need to plug in the USB PD Charging port into the wall (using an appropriately rated PD charger, not your 30w Apple charger), then the other ports will output power as expected. USB-C PD spec is a confusing mess.