Yes, a coffee maker that connects to the internet does exist, usually for more than I spent on everything involved, and also usually with its own headaches.

I find that usually those devices all want their OWN app installed, so instead of just your home assistant, you have HA, and the Mr Coffee app, and the GE app, and whatever else, each with their own requests for telemetry and whatnot.

Building your own out of simple devices gives you more control and an easier vector to secure.