APFS Formatted external drive doesn't mount

I have a band new WD Mypassport 5tb, formatted in APFS.

Since a couple of weeks it refuses to mount.

It is visible in disk utility.

The volume shows, when I click on Mount it requests my password (Triple checked it).

And doesn't mount...

Diskutil ap list tells:

Code

APFS Containers (2 found)

|

+-- Container disk1 E83C3E97-AAB5-46E5-8668-5BA633D924E2

|  ====================================================

|  APFS Container Reference:    disk1

*****

+-- Container disk6 A3269169-9BE9-42E1-9134-2B4E18550726

    ====================================================

    APFS Container Reference:    disk6

    Size (Capacity Ceiling):      5000737546240 B (5.0 TB)

    Capacity In Use By Volumes:  4040648863744 B (4.0 TB) (80.8% used)

    Capacity Not Allocated:      960088682496 B (960.1 GB) (19.2% free)

    |

    +-< Physical Store disk2s2 0C11BB9F-74D2-4E3F-8D3A-FD335B08F460

    |  -----------------------------------------------------------

    |  APFS Physical Store Disk:  disk2s2

    |  Size:                      5000737546240 B (5.0 TB)

    |

    +-> Volume disk6s1 2C6E599C-C204-4BE1-A981-16EA2A914D3B

        ---------------------------------------------------

        APFS Volume Disk (Role):  disk6s1 (No specific role)

        Name:                      DATA-GBA-5T-A (Case-insensitive)

        Mount Point:              Not Mounted

        Capacity Consumed:        4040088399872 B (4.0 TB)

        FileVault:                Yes (Unlocked)

So I don't believe the disk has failed, it looks like APFS is doing something wrong