I have tried "anker powerexpand elite". When in clamshell mode, the external display does not wake from sleep.
I contacted caldigit to see if their docks have the same issue. They said they are aware of this issue and requested I contact apple to report it.
There are also other issues, like the MBP M1 "forgetting" the display settings when you use HDMI.
In short, I think there is an issue with the M1 which is causing problems with docking stations and display adapters in general. The same problem exists with the latest release - 11.1.
My current solution is a USB-C monitor with integrated hub - that works OK - but there are other issues related to refresh rate, HDR, etc - which annoyingly work via an HDMI adapter/dock but not direct through USB-C....
I would hold off on getting a dock for now, unless you are happy not to use clamshell mode, and only drive a TB3/USB-C monitor. Hopefully apple will fix these issues soon.