Yes, Legion 5 Pro has two NVMe PCIe 3.0 2280 SSD slots, the second slot is empty and has a pre-installed heatsink with a thermal pad. (I installed Samsung 970 Evo 1TB
Legion 5i Pro Gen 6] Can Windows be booted from the 2nd NVMe SSD drive installed on the left side or does the OS have to be installed on the drive to
How to upgrade or add an SSD to Lenovo's Legion 5i 15 | Windows Central