In principle the display technology is separate from the dashboard technology. However, currently in Homey, both are often related/packed into one solution.
If Homey’s dashboard functionality would also be available in its web app, then you would be able to display it on any computer / display, including e-ink displays (whether in black & white or with colors).
In the past there have been initiatives like Homey.ink and smpl, but those have been decommissioned I believe.
Would be great indeed if you could simply connect any e-ink display and display whatever Homey info to your liking.