Sounds like some logic you can tease out with node-red. I don’t know of a native way to do it in HA.
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Yeah node red + the notification services on HA would definitely be how I do this. In fact, I kinda do already.
Sorry to not tell that, the plan is indeed for doing this in node red. I only want an example to put me on the right track and thought maybe someone else had something similar.
I've actually been trying to implement something like this myself, but I'm trying to do it natively in HA. What I've done so far is make an automation for each appliance that calls a script (with variables passed through for messages and whatnot) which notified each member of the household in parallel, based on whether they're home or not.
My eventual plan is to make each appliance automation flip an input_boolean that sends an initial notification which can be dismissed (either by sensor, NFC tag or notification action). Then every so often or based on a trigger (like door opening, toothbrush doing off, etc.) it triggers the notification script again.