The Samsung device can search for nearby devices in the background. Found devices appear in a pop-up from which a connection can be established. The search will take place even if Bluetooth is deactivated.

In the settings, the function "Nearby device scanning" can be switched on or off.

Android 10 (One UI 2.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Connections
Step 3:  Tap on  More connection settings
Step 4:  Enable or disable  Nearby device scanning
  1. Open the Settings
  2. Tap on Connections
  3. Tap on More connection settings
  4. Enable or disable Nearby device scanning

Samsung Instructions
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