Hubitat never announces their hardware plans. At the most recent Hubitat Live, it appeared as if a firmware update would bring Matter compatibility to the C-7.
The Kasa integration is actually a community integration from @djgutheinz that is now built into the platform. @djgutheinz is constantly improving his code or updating it to add support for additional devices, so I would suggest you use his Kasa thread to request new features or support for new devices. I've linked to it below:
