Swapped motherboard, cpu, ram. No boot option to bazzite

As in the title, had an old intel skylake block and swapped it for a recent am5 based system. Had a sata ssd qirh bazzite deck installed and a second drive with some games.
Started the system but the bios and the boot option fi not show any bazzite entry, not enything else since it was the only os installed.

Do I have to set up fast boot, secure boot or something else to make it show? Any suggestion or am I better reinstall?
It was a gaming htpc anyway, I can afford reinstalling games.
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