Your stovetop has a temperature sensor. That signal might be amplified by a transistor

Somebody's not a big Technology Connections fan. No, it's all eletro-mechanical. Essentially, there's a bimetal switch that the current runs thru before the burner that heats up and disconnects based on the position of the dial. A temp sensor and transistors would be way more complicated and expensive. To drive the point home, these stovetops were invented and mass produced way before the invention of the transistor.

Also, your definitelion of electronics is not quite right: https://dictionary.cambridge.org/us/dictionary/english/electronic

using, based on, or used in a system of operation that involves the control of electric current by various devices.

Therefore a potentiometer is a simple electronic device. So a simple dimmer switch on the wall is eletronic and does not have transistors.

I'd argue that a switch is also a simple electronic device. Therefore every light switch is a transistorless device in your home.

Transistors, while ubiquitous, aren't required for an electronic device and many electronic devices were invented before transitors.