Is or can Homey act as a Thead boarder router?

I was wondering if this is possible?
If so how and can Homey be added to Home assistant via this method?

My HA instance sees Homey as a border router:

So I assume it’s possible.

in that case you should be able to see all the devices from Homey in HA as well, no need for the MQTT app any more then…

No, a Thread border router will only provide access to Thread devices.

I think you need to read up on the purpose of Thread bridges and routers and their Matter involvement