I found that the udisks2 can not show Partition Type of EFI System Partition on
my openSUSE TW VM:

Vigor101:~ # udisksctl info --block-device /dev/vda1
/org/freedesktop/UDisks2/block_devices/vda1:
  org.freedesktop.UDisks2.Block:
...
  org.freedesktop.UDisks2.Partition:
    Flags:              0
    IsContained:        false
    IsContainer:        false
    Name:
    Number:             1
    Offset:             1048576
    Size:               524288000
    Table:              '/org/freedesktop/UDisks2/block_devices/vda'
    Type:                      <-- Type field is empty
    UUID:

It causes that the dbxtool can not detect ESP partition.

The udisks2 version is 2.9.2. But the same version can show partition type of
ESP on physical machine.