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 PRO / M.2 SSD UPGRADE / HOW TO DO IT - YouTube
Legion Y530: Adding a HDD afterwards - LenardGunda.com