I have now uninstalled fwupd and then installed the Snap Version 2.0.5 Stable.
Now everything seems to work.
Before was the dbx version 468
Since fwupd snap is the version 20241101
fwupdmgr get-updates
Devices with no available firmware updates:
• KINGSTON SNVS1000G
• System Firmware
Devices with the latest available firmware version:
• UEFI dbx
No updates available
This is how it works
I have no idea why this is the case 