Unfortunately, still not. The new Apple TV 4K Box (2021) also still does not support Siri for Switzerland. Austria (German) is now available. According to the Youtube channel "Apfelwelt", there is a way to activate Siri anyway. First open a Germany Apple ID and log in to the Apple TV 4K with it. Switch on Siri. Then log in again with the SWISS Apple ID. Then "according to "Apfelwelt" Siri should remain switched on and usable. Source:
youtu.be/G4hj4dUmAB8?t=277
Watson test of the new Apple TV box (2021). Siri for Switzerland will not be supported. Source:
https://www.watson.ch/digital...
Apple TV 4: How to activate Siri in Austria and Switzerland. Source:
https://www.maclife.de/ratgeber...
All information is provided without guarantee and is not exhaustive.