Bluetooth device names not showing up

Question

I'm trying for the first time (on this installation) to set up a Bluetooth mouse with my computer running a stripped down Ubuntu Bionic.

I believe my device is detected properly. The problem is that I can't figure out which one it is because the Bluetooth module(?) only displays device IDs in hex and no human readable names at all, neither in the blueman applet nor in the bluetoothctl. bluetoothctl says:

Device 40:06:37:CF:D8:50 40-06-37-CF-D8-50                                                                                                                                                                                                                                                  
Device 7F:2F:05:73:BF:09 7F-2F-05-73-BF-09
Device 4B:91:14:95:7C:A9 4B-91-14-95-7C-A9
Device 08:F8:C2:7D:59:69 08-F8-C2-7D-59-69
Device A4:31:35:07:0B:4E A4-31-35-07-0B-4E
Device DC:56:E7:50:93:4E DC-56-E7-50-93-4E
Device 68:C6:01:FA:79:E3 68-C6-01-FA-79-E3
Device 44:3D:DC:E9:3A:01 44-3D-DC-E9-3A-01
Device 28:1C:A5:8B:81:C9 28-1C-A5-8B-81-C9
Device 5D:C7:2C:D4:7A:39 5D-C7-2C-D4-7A-39
Device 40:CB:C0:EB:5C:64 40-CB-C0-EB-5C-64

and eg.

[bluetooth]# info 7F:2F:05:73:BF:09
Device 7F:2F:05:73:BF:09 (random)
        Alias: 7F-2F-05-73-BF-09
        Paired: no
        Trusted: no
        Blocked: no
        Connected: no
        LegacyPairing: no
        ManufacturerData Key: 0x004c
        ManufacturerData Value:
  10 05 03 1c 5f 51 09                             ...._Q.

Could anyone help me get the actual device names to be displayed?

Thanks in advance