Lenovo ThinkPad 256gb PCIe NVMe Opal2.0 SSD for sale online | eBay
I bought the new Samsung 980 Pro 1TB (PCIe 4.0) and put in the Lenovo Yoga Slim 7 (PCIe 3.0), I saw only ~10% decrease in raw performance : r/AMDLaptops
Samsung SSD 980 Review: Affordable NVMe PC Storage | HotHardware