Can You Help me Understand This SATA NVMe PCIe SSD Gen

In particular SATA SSDs are usually B+M key, so you can use them in any slot that supports SATA There are also NVMe SSDs with B+M key, but

Dual NVMe PCIe Gen3 X4 Slots Intel USB Gen1 Type-C Support See all features

nvme and m2 slot difference Explore the Different Types of SSDs: SATA, NVMe, , , and PCIe Dive 2 slot type, size, and interface support What Is a PCIe SSD? PCIe SSDs

nvme pcie slot Your PC's motherboard has support for an socket 3 , 2280 footprint SSD As far as I have found, NVMe SSD types are not compatible with