I live in a big city in the center. When i activate “Show bluetooth devices without names” in the developer settings of my android 13 phone, there appear loads of this devices. I have no clue what they are. Does anyone know? Are that the bluetooth nanobots of the vaxxinated people? (/s to last question!)
I have replaced almost every light bulb in my house with smart bulbs which feature both bluetooth and zigbee connections. It’s around 40 devices. If your neighbour has smart bulbs or other devices, I guess that could be a large part of it.