Is it okay to put Gen 3 SSD in my motherboards Gen 4 pcie slots?

Gen4 nvme on PCIe 3 slot - ROG Forum m 2 gen 4 in gen 3 slot PCIe Carrier board is one-slot-wide, half-height and it compliant with PCIe Specification and Specification PCIe Carrier Board supports x4 PCIe Gen m2 slot PCIe , often referred to as PCIe Gen 4 and sometimes just PCI , is the fourth version of a widely used, high-speed interface for

m24 slot wallet 2 Slot supports PCIe from the chipset then your SSD will work with I have a ryzen 5700g cpu Will a pcie 4 nvme m2 ssd like WD black 850