Bios/windows setup can't detect m.2 ssd

You have an obsolete motherboard and it is not as simple as insert M.2 and install. There are some things that need to be done first. One is a bios update to support M.2 drives and second you need to read and follow this guide;
https://www.intel.com/content/www/u...05967/memory-and-storage/enthusiast-ssds.html
Once you do all of that, you should be able to install on a M.2.

Do understand that this requires a medium level of skill since you have to load the intel M.2 driver during setup. Be sure you read and FULLY understand the flashing procedure. While a bios update is not difficult, an incorrect flash can render your motherboard unbootable ie junk. The only way I ever update a bios on an asus board is by using EZFlash which is a utility built into the bios. I never update from within windows.

One other item. When doing an install on a M.2 type of drive, pull the pw connectors from all other hard drives prior to starting the install process. Win10 setup will install the boot files to the first drive ie on sata0 or 1 depending on how the mfg labels sata ports. With the pw connectors pulled, setup has no choice other than to install all files to the M.2 drive.