You keep asking the same questions, scattered over multiple threads. It is very possible the same firmware core is used across multiple models, so the option may in fact be there even when the hardware doesn't support SATA, as most systems made in the last few years do not. Since you've already failed at installing an M.2 SATA drive, what more evidence do you need? If you're not convinced an M.2 drive will work, simply replace the hard drive with a 2.5" SATA SS drive.  It's a drop-in replacement with no potential for incompatibility.
My Inspiron 3580 have m.2 slot.my bios shows m.2 sata and pcie (look at picture).but I checked m.2 sata on it it not recognised by bios or windows.and acording tolaptop specsheet my laptop only support nvme.so why bios show m.2 SSD and m.2 pcie both.is it mistake of bios?     [IMAGE]  
Abut ssd