Found a partial solution that seems to address the instant wake up under
Wayland.

It seems that by default, the AOS2770SHE starts polling once display
disconnects on one of its inputs. This seems to cause the actual system to wake
up. However, this was not an issue before and used to function with no problems
previously. It seems that something in amgdpu DC code changed that is picking
up these polling requests.

To get the monitors to sleep properly, I did the following:

Set "Input Select":  Auto -> HDMI1
Set "DDC/CI": Yes -> No

Now the display sleeps as expected and wakes up with no issues. Still would
like to know what changed to cause this to appear. I usually need to have the
inputs set to Auto as I have a docking station plugged into the monitors for
the work laptop.

Also amdgpu.dc=0 hands the system and it's only becomes accessable through ssh.
However no errors are present in any logs. But I'll file a different bug once I
nail it down to a specific component.