Turning bt "off" in your settings likely doesn't actually turn off the radios. It probably just disables connections. If you use lost phone features like findmy

Turning bt "off" in your settings likely doesn't actually turn off the radios. It probably just disables connections. If you use lost phone features like findmyiphone, the defaults are to participate in the "find my" network, a mesh network of bt low energy devices for airtags, etc. Most often, even turning off your entire phone won't help, as the incentive to participate in the "find my" network is they give you the feature of tracking your phone even when powered off https://en.wikipedia.org/wiki/Find_My https://en.wikipedia.org/wiki/Find_My https://en.wikipedia.org/wiki/IBeacon https://en.wikipedia.org/wiki/IBeacon