Switch element

with the switch element. is it possible to turn off one switch element and it turns off the other by default?

No, I don’t believe you can’t do that. What’s your use case?

As @ThinhDinh mentioned, switches can’t have custom actions attached to them, so the only way you’d be able to achieve this is with buttons or action row components. Then you’d be able to attach a custom action to each button that could control the other buttons.