OS not recognized on boot from USB: yunohost-bullseye-11.0.9-amd64-stable

My YunoHost server

Hardware: Old desktop. x86-64bit.
YunoHost version: 11.0.9
I have access to my server : physical access, booting via USB
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no
If yes, please explain:

Description of my issue

There is a bug in the ISO I listed in the title. I burned the ISO to a USB using 2 different options (dd and SUSE Imagewriter).

I made sure the boot order is right by checking the BIOS and pushing all USB boot sequences above HDD.

Attempting to boot from the USB results in: No Operating System found (1962 bug)

Wanted to make sure it’s not a hardware bug so I burned another Linux ISO to the USB and that one booted into Linux just fine (it was Manjaro with a DE).

Issue seems to be with the yunohost ISO (maybe).