@mschleider,

The KE200 was only a device that was announced at CES and may or may not come out before the next CES. As the KE200 is a Matter-Compatible Device, I would expect to see information about a potential release of a matter thermostat after our base-product line has been filled out with compatible devices, such as plugs, switches, and lights. 

Currently, the only Matter devices available are the:

Smart Plugs: Kasa KP125M, Tapo P125M

Smart Dimmers/Switches: Tapo S505, Tapo S505D

You can expect to see a much larger lineup of matter products soon as we are releasing compatible models each month.