Scroll down to "anonymization": https://ipinfo.io/what-is-my-ip

If there's anything there, monitor your network to figure out exactly what

Fantastic question. There is so much IOT garbage out there that someone might slip into my network, what can I do to easily detect it?

I was aghast when my partner connected a pet watering bowl to the WiFi.

This one actually works: https://news.ycombinator.com/item?id=49713037

Watch egress at the router for anything unaccounted for, tbh.