only uefi mode

I have an Acer Nitro 5, i5-8300h ,1TB HDD. Today i bought an nvme m.2 installed it and cloned it (with windows 10). While booting my pc from the bios (by the way my bios has only uefi mode no "legacy"), in the boot option it is not showing my ssd only showing windows...something. What should i...