Disable Bluetooth discoverability in Redmi 6 / MIUI 11

Is it possible to completely turn of the ability of my Redmi 6 (using MIUI 11 currently) to being discovered via Bluetooth by other devices? If yes, then how to achieve this? Things I've tried or read so far: * No corresponding system option (NFUI clone on my Neffos X9 still has it) * [This answer](https://android.stackexchange.com/a/218122/20449) that is reported to not work under MIUI 10 so won't work most likely under MIUI 11 * Turning off [Bluetooth Scanning](https://www.reddit.com/r/Xiaomi/comments/csc99i/turn_off_bluetooth_visibility/) (turned off, no effect, device still discoverable) * Using [Bluetooth Settings](https://play.google.com/store/apps/details?id=by4a.bluetoothsettings&gl=AT) 3rd party application I had the biggest faith in last option (Bluetooth Settings app), but it fails completely under Readmi 6 / MIUI 11. Not only Bluetooth discoverability is turned on again when phone is restarted or Bluetooth is enabled, as it is written [here](https://android.stackexchange.com/a/218122/20449) . It is also turned on again when any paired device connects to it or when Bluetooth Settings app is reopened again. So this is a completely false pathway.