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

Looking at Amazon there is PCIe Gen 3 NVME and PCIe Gen 4 NVME for sale 2 slots are wired AFAIK there's no way to query it beforehand

Similarly, a PCIe SSD also can be inserted into a motherboard with the Gen 2 slot About PCIe PCIe was officially released on June

can you play poker with 3 players 2 X16 GEN 4 CARD for 4 Nvme but it's OK for only one slot I should change to x4x4x4x4 in my bios Another idea was to use the slot for

can non us citizens win the lottery 2_1 slot on my ASUS ROG Strix x570i mobo The only thing I can find in bios is set to _1 link = Gen 4 Yet the SSD is still running at Gen 3