Don't know why you've been down voted but don't worry I put you back up to positive.
Your toaster automation sounds like what I had to do with the old dishwasher. It would finish the cycle but not stop, so it would continually try to keep up to temperature for some reason.
So I had my notify automation for when it was done and then I had it switch off when the power dropped.
Minor inconvenience to that setup was having to turn it back on again when I wanted to use it. I didn't wanna have to go under the sink and wade through all the shit in there to get to the plug so I used Google "Hey Google, wash up"
But we have a new one now so I can leave it on.
I also have the washing machine notification. At present it announces when the motion sensor in the kitchen picks up movement and the washer is finished, and sends a notification to the phones in the house when the announcement is made with "I emptied it" and "Ignore" so you walk in the kitchen, get shouted at to empty the washer and a phone notification.
But I am planning on having the same presence detection pick up who triggered the motion sensor and only notify that phone, just haven't gotten around to it just yet