[IvyMike]

I would need a device with a physical switch rather than a touch control. Sadly many devices, mine included, have "power was cycled = device is off" logic.

[sksksk]

You might have luck with these... https://uk.switch-bot.com/products/switchbot-bot

[NegativeLatency]

curiously mine are digital momentary switches, they just happen to store their state in some kind of nonvolatile storage