Anker have said repeatedly there is more USBC stuff coming but not specifics.
What I do is I use 2A USB2 defensively via connecting power proactively to slow device battery drain. It works well enough for me. A Powerport2 with Powecore 10000 is sufficient.
I have the Powerport5 USBC and it isn’t as fast as the supplied 3A charger so I can’t do things like wait for device to be nearly flat then connect Anker and expect to use device and recharge device.