Why is the IP address displayed in device information not the same as my home network IP address?

A hardware device must have an IP address during network configuration on the app. This IP address is not the device's real IP address because the device's real IP address belongs to the routing network segment. The IP address is a gateway IP address used to connect the private network to the Internet. The gateway IP address is the public IP address of the router on the home network and exists in all network access scenarios.