I think the new Hue switches do exactly

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Ah, https://www.zigbee2mqtt.io/devices/929003017102.html maybe? Thanks for the hint.

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Bit sad that it's operated by a battery…

while in theory there is electricity lying around next to it 😄

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https://devices.esphome.io/devices/Shelly-1#detached-switch-mode-for-toggle-light-switch this is also a good solution… at least it reads like a good one