The specs of the Bluetooth chip state that Bluetooth LE is supported. Yet when I try to pair a BLE device with Librem 5, it simply does not appear in a scan. I tried the GUI in PureOS and bluetoothctl with scan enabled. The device itself is working correctly, I’m able to see it in my Android phone …

It is disabled by default due to a firmware bug. But you can enable it manually, see: Bluetooth not found but service runs no default controller