X570 E-gaming, m2 not seen in windows install

Hey all,

Just finished assembling my new build, bios update to support ryzen 5900x
Now i'm facing a problem where I can boot the computer via a USB with windows 10 but the windows installation cannot find the m2.

Since this is the only HDD/SSD/NVME I have on the computer I can't install windows.

I can see the m2 in BIOS with CSM Enables, all UEFI options on.
I can only boot with the USB Boot Pen if i set it as #1 boot option.

I followed some tutorials converting the NVME to a GPT or GTP drive but still windows installer does not see the m2 drive, although the bios does.

Thank you for any feedback