Does the Xiaomi Induction Cooker Lite have overheating protection and why does the Xiaomi Induction Cooker Lite sometimes spark when plugging in the power cord to the socket?

Yes, the Xiaomi Induction Cooker Lite is equipped with safety features such as overheating power-off protection and automatic heating cessation in the absence of cookware. You can use it with confidence.
When most household appliances are powered on, there is a momentary surge current, and there will have a slight spark between the socket and the plug. If the conductive copper sheet of the socket is deformed or loose, the spark will be more noticeable. We recommend using a switch-equipped socket from a reputable brand for better safety.