Does any PCIe slot support NVMe SSD's automatically or do I need

You can use PCIe X4 slots for storage expansion cards Each X4 slot capable of 4GBs, so its better to have one device per slot

No, the NVMe SSD can fit into the SATA SSD slot but it doesn't work The reason is NVMe SSD using PCIe interface

candy village slot So, I can switch over to the SATA version and use the slot I have that appears to be NVMe but can actually accept the SATA SSD

can i use gen 4 ssd on gen 3 slot 2, also known as NGFF is the successor of the mSATA standard for expansion cards is very flexible and is widely used as an