Is there any benefit to putting a PCIe 4 SSD in a PCIe 3 slot?

Best SSDs for gaming in 2024 m 2 gen 4 in gen 3 slot slots x 5 I'm looking to add 2 pcie gen 4 nvme SSDs I assume one drive will use one of the x16 lanes And the graphics m2 expansion 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 pc 3 I225-LM x 1); 22802242 M-Key x 2, 30423052 B-Key x 1 + Micro SIM Slot x 1, Mini PCIe x 1 + Micro SIM Slot x 1; USB Gen 2 x 2, USB Gen 1 x 4