I saw a fridge that had an app so you could control it from anywhere.
My requirements for a fridge are remarkably simple, to the point the only practical use I could think of an app was alarm that I'd left the door open or something.
(If this particular app did have a door-open alarm, it wasn't on the list of features. It did say you could adjust the temperature from your office. A location I'm often worrying about the fridge.)
I have yet to see a single non-bullshit feature from any "smart" appliance, honestly.
I would like a smart fridge that lets me know what is inside - so I know if I should get milk or a salad on my way home. So far nobody makes that.
I feel this is a terrible trade-off: a minor convenience, in exchange for a huge attack surface that could allow someone to burn your house down remotely. The folks who build IoT systems have neither the skill nor the economic incentive to keep these things secure for the 15+ year lifespan of a durable good like a cooking range.
Would be fun though, appliances can just have a "make me smart socket" with direct connection to hardware. Then it's the smart plug that needs kept updated, but more sustainable since it's used for many products. And if your manufacturer for it dies, can just replace with any other one since they'd be held to a standard.