Difficult, because ZHA and Z2M take such different approaches. Z2M is device by device - it provides a handler for each one (which is why they can list them). ZHA is generic - the integration should work with any device that implements Zigbee properly, making a list impossible. Actually, I think the number of devices they support is probably about the same.
Also, the Z2M gateway is widely used by other systems - what we see is just the HA integration.
The new roadmap mentions a “device database” which should provide some of what you want.
PS. Don’t forget to vote for your own feature request.