Here are some recent HN threads on through-wall 2.4Ghz Wi-Fi Sensing with CSI radar and IEEE 802.11bf:
Surveilling the masses with wi-fi-based positioning systems (2024), 140 comments, https://news.ycombinator.com/item?id=40492234
The spies in your home: How WiFi companies monitor your private life (2024), 40 comments, https://news.ycombinator.com/item?id=41272294
Wild new Wi-Fi routers turn your home network into a security radar (2024), 40 comments, https://news.ycombinator.com/item?id=40897828
Inside a $1 radar motion sensor (2024), 100 comments, https://news.ycombinator.com/item?id=40834349