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 Disassembly (RAM, M.2 SSD upgrade options)
Lenovo Legion 5 15" Gaming Laptop AMD Ryzen 7 5800H NVIDIA GeForce RTX 3050 Ti 8GB Memory 512GB SSD Phantom Blue 82JW00BFUS/82JW000XUS - Best Buy
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