There’s definitely a need for security apps(if not core OS functionality) to log wireless device traffic around you and surface anything fishy. There are apps that can do this already, but the space is split between user-unfriendly technical tools and spytech “bug detector” woo apps, and it can be difficult to tell the two apart.
The first company to pin down a good user experience and brand this stuff as “antivirus for your personal space” is gonna make a bundle.