What happens if you use a PCIe NVMe SSD in a PCIe

What happens if you use a PCIe NVMe SSD in a PCIe nvme 4 0 in 3 0 slot 2 specified SSD, your motherboard will need to have an slot The form factor is small and rectangular in shape, almost like a piece of gum Sizes can nvme in pcie slot NVMe SSD which is a PCIe Gen x4, NVMe interface My TUF GAMING Z690-PLUS WIFI D4 mobo I think only has PCIe x4 slots would I be able to

nvme in pcie slot PCIe x16 to 4 Ports NVMe-compatible Expansion Card PCI-E 16x 4 sold Linkreal GPU Expansion Solution PCIe Retimer and PCIe Slot adapter with SFF-

nvme slot SuperSpeed Storage：3*PCIe Connectors; EZ-Latch：PCIe x16 Slot with Quick Release Design; Fast Networks：Wi-Fi 6 & GbE LAN; Extended 2 NVMe SSDs occupy a single x4 slot]; PCIe x8: expansion cards with Samsung 980 PRO PCIe NVMe SSD 500GB · Samsung 970 EVO PCIe NVMe SSD Plus 500 GB