Well ... putting my sata controller in AHCI mode (in the BIOS) seems to have solved my problem.

Something like this?

https://www.getpcpanel.com/shop

Not one knob but you can adjust multiple sources with hardware knobs.

Or maybe I don't understand what you'd like?

I saw somewhere that Fedora has stopped supporting legacy bios so I tought that might do the trick, but nope ... same problem with Fedora 36.

I finally solved the problem by putting the SATA controller in AHCI mode (in the bios).

Thanks!

Glad I could help. I've also seen some DIY projects, but not sure how hard that would be.

Yep . I hadn't tried the install from the live USB since at first I created a fedora-server USB installer , so I gave it a go. It boots in the live-os just fine, but installation on HD fails.