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 5i Pro (16", 2022) - disassembly and upgrade options - YouTube
Lenovo Legion 5 Pro 16iah7h L6ix Computer portatile 40,6 cm (16") | Comet