Can I Use a PCIe NVMe SSD in a PCIe Motherboard Slot?

What happens if you use a PCIe NVMe SSD in a PCIe m 2 pcie 4 0 in 3 0 slot I had an Asus HYPER X16 GEN 4 CARD for 4 Nvme but it's OK for only one slot I should change to x4x4x4x4 in my bios Another idea was to m24 slot Buy NVMe PCIe Adapter SSD to PCIe Expansion Card with Aluminum Heat Sink, Support PCIe X4X8X16 Slot online at low price in India on

m2 slot mainboard I have an AMD 5800x, which has 20 pcie lanes I want to put 2 GPUs in a motherboard with 2 PCIe x16 slots, but 1 of