Hello, I bought a brand new unlocked Pixel 6a. The OEM unlocking was available and proceed the installation with the Web Installer with the stock cable, all smooth until 'Flash release' step with this error:

"Error: Failed to execute 'claimInterface' on 'USBDevice': Unable to claim interface."

I tried two other cables c-a with same error.
Switch to LCI and it keeps saying:

< Waiting for any device >

Switch cables again with no change in the message.
I did 'Restart bootloader' and try again and nothing change. Neither the web or CLI.
No option or chance to 'Lock the bootloader' I tried it all I could.
Select 'power off' and started in Bootloader (still Unlocked) and tried again but nothing. It wont connect-detect the phone. I'm not able to lock the Bootloader in any way.
When start the phone, Google starts again. This time with a warning message at booting saying:

The bootloader is unlocked and software Integrity cannot
be guaranteed. Any data stored on the device may be
available to attackers. Do not store any sensitive data on
the device.

Visit this link on another device:
g.co/ABH

After the previous warning, starts in Google OS and the OEM it's greyed.

I Deleted my pin and any security.
Factory Reset and nothing changed.

So:

Non of the web or CLI worked for me.
The process did change the Bootloader version?
Bootloader remains stuck UNLOCKED
The OEM it's greyed now in Google OS.

I need help before I do any harm I will regret, if I'm not there already...
¿Any advice?
Thank you in advance!

Detected Changes:

-> The Fastboot screen reads NOW:

Fastboot Mode
Product revision: bluejay MP1.0

Bootloader version: bluejay-1.2-9075776
Baseband version: g5123b-........
Serial Number: ......
Secure boot: PRODUCTION
NOS production: yes
UFS: 128 Micron
Device state: unlocked (In orange colour)
Boot slot: a
Enter reason: vol down pressed
UART: disabled

-> BEFORE UNLOCKING: (The rest data looks the same)

Bootloader version: bluejay-1.2-8893284
Device state: locked

Operating System: TUXEDO OS 22.04 (based on Ubuntu 22.04 LTS)
KDE Plasma Version: 5.24.6
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
Kernel Version: 5.15.0-10052-tuxedo (64-bit)