Does Windows use Bluetooth Authenticated pairing with encryption automatically?

Does Windows use Bluetooth Authenticated pairing with encryption automatically?

Does Windows use Bluetooth Authenticated pairing with encryption automatically when you connect Bluetooth devices like earbuds to it? Is that Level 4? If it's not automatic, how do I get Windows to do that?

Is there any way to prevent other people from seeing and/or connecting to your Bluetooth devices like earbuds? And only for your phone/laptop to be connected to it?