@loic2907
What lets you believe, that the NVMe SSD is not detected by your device’s BIOS?
If you are able to boot into any Windows OS, what does the “Disks” section of the Device Manager show?
Which Windows OS are you running or want to run?
If you can boot off an USB Flash drive and want to get Win10 or Win11 installed onto the NVMe SSD, I recommend to follow the chapter “Step 4 - Installation of Win10/11 onto the NVMe SSD” of >this< Guide. Maybe the BIOS cannot find the EFI bootsector named “Windows Bootmanager”.