BLE connect with zero service and zero characteristic

Hello,

I try to use MKR WIFI 1010 as a central to connect with the micro:bit as a peripheral by using the sample code "Peripheral Explorer". After successful connection, we find that when the micro:bit in pairing mode, the central can discover attribute information by the functions, peripheral.discoverAttributes and peripheral.characteristicCount. However, if the central device connects micro:bit in normal mode, the connection is still built successfully, but it can't discover any attribute information.

Can the central device access the service or characteristic under normal mode? Or it can only access under pairing mode.

Under pairing mode

Under normal mode

Thanks for the help!