I am using the German Corona Contact Tracing app (v2.11.2.0) on FP3+, which requires permanently open Bluetooth.
So far my phone is in open sight of anybody who wants to mess with it, as there is no option to hide the device.
This is strange, since I know that other devices offer the opportunity to choose between visible and invisible status or be visibility for some time (e.g. two minutes or while bluetooth-settings are open as on the FP2) and then go stealth, which is a well appreciated protective measure.
Bluetooth-hacks are quite common, and I do not want to help someone to steal my data or brick my phone by ignoring that.
Is there really no solution for that?
Well, meanwhile I have doublechecked it.
Looks like it behaves like the FP2 did: Visible while settings open, invisible when settings closed.
Important: If the settings are open in the background, it is still visible.
Solved.
Thank you.