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
Lenovo Legion 5 i7-11800H-SSD 512GB-16GB-RTX3060-6G-15.6 FHD-IPS 144Hz-DOS-Phantom Blue – PC Trend