HDMI display not working with M1 MacBook Air + OWC USB-C Dock

I have switched to an M1 MBA from the 2015 12" Retina Macbook.

For several years I have been using the OWC USB-C Dock with HDMI and a 32" LG monitor that has HDMI and DP outputs. I do not have the OWC dock that is currently being sold that has MiniDP, I have the previous version that has HDMI only. There are no other video ports on this dock.

The MBA recognizes but does not output to the external display when connected to this dock. The screen is blue. I can open the preferences pane and see the other monitor is recognized by name and change settings, etc. No change with the laptop screen open or closed.

I'd read elsewhere that the presence of a 2nd display bus on a dock or dongle would likely prevent the M1 from wanting to work even if only one was actually being used, but this dock has only one bus.

To troubleshoot, I connected the generic 7-in-1 USB-C dongle from Amazon that I travel with directly to the monitor using HDMI (it's the only video port on the dongle as well) - monitor works.

Any thoughts?