Instant Pot Duo - I've had it for 8yrs, and it's great. I use it to make yogurt, pressure cook stuff in and slow cook.
Thermomix TM6 - expensive (I got it with some money that my parents left me 3yrs ago), but worth it. A friend had a TM5 and I saw how versatile it was over the years. I use it pretty much everyday. It will slice, grate, sauce, steam, cook rice, boil eggs, sous vide, grind stuff, do all kinds of food prep and cooking. Really handy when you're juggling FT work, solo parenting and wanting to cook lovely food. I can quickly do the prep and then leave it to do its thing whilst I'm seeing to the kids/sorting the house etc, and food won't be burned or overcooked. It has an app (for recipes etc) that syncs with the machine itself, so you can choose meals for the week, and it can link to a grocery app to automatically add anything you might need for that week. You can also use it without the app.
Panasonic Breadmaker - this was one my parents had (so it's an old model) and I got it when they died. It makes lovely bread, but can also do cakes and jams.
Ninja airfryer - I've got the dual drawer one. Very efficient cooking, faster than my oven. Safe and easy for my kids to use too.
The above gadgets mean that I rarely use my hob or oven!