taichi x370

Howdy everyone. I have a taichi x370 Asrock with a ryzen 1700x, but I seem to be having some issues. I have 2 m.2s installed already taking up 2 of the pci lanes, plus a gpu. PCI slot 2 should be fine but it seems to only see one of the m.2's. I am not looking for a fancy raid or anything. I...