Eric Griffith, PC Magazine
When the Sidewalk Bridges(s) in your house are active, wireless signals that reach outside your home to the sidewalk and beyond will allow any passing Sidewalk-enabled device (called a Sidewalk Endpoint) to instantly connect. Sidewalk will also help set up new Amazon products on your home Wi-Fi. You’re not going to use Amazon Sidewalk to sidle up to the neighbor’s house, access their Wi-Fi on your laptop, and use their ISP bandwidth to watch Netflix. But your Echo devices and your neighbors can co-mingle, forming a low-energy, long-range mesh network over the whole area. That means if you have a network outage at your location alone, a smart device in your house (say your Ring doorbell) may still function—but not enough to send a video stream. It doesn’t have the bandwidth for that.
https://www.pcmag.com/how-to/what-is-amazon-sidewalk-and-how-do-you-disable-it
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