BTTT ...
My number of IoT devices is quite small for this reason. And besides, why does my refrigerator, washing machine, or light bulbs need to access the Internet, really? I have a Nest thermostat is about it, and I don’t let it talk to the Internet.
I do worry a little about AT&T’s router, and have considered upgrading to something light commercial grade, like a Ubiquiti UniFi Security Gateway to go with the WAP I’ve had for a while. And if I did add IoT stuff around the house, I’d darn sure VLAN it off from the home network, at minimum.