Does 2 nd generation Apple 4k tv support matter threads

Apple TV 4K (2nd generation) (2021) is not compatible with non-HomeKit Thread devices.

Apple TV 4K (3rd generation) (2022) is compatible with non-HomeKit Thread devices.

Thread is a non-Wifi wireless mesh communication protocol. Thread is low bandwidth, so not really suitable for audio or video. More like control signals (lock-unlock, open-close, on-standby, mode x-y-z).

Matter is the overarching interoperability ‘language’ to make devices independent of separate native HomeKit support.

You’ll need an Apple TV 4K (3rd generation) for Matter support.

Apple TV 4K (2nd generation) technical specifications - Apple Support

Apple TV 4K (3rd generation) technical specifications - Apple Support

Apple introduces the powerful next-generation Apple TV 4K - Apple Newsroom