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
How to upgrade or add an SSD to Lenovo's Legion 5i 15 | Windows Central
Lenovo Legion 5 17.3" 144Hz Gaming Laptop FHD Ryzen 7 5800H RTX 3050 4GB with 8GB RAM and 512GB SSD Phantom Blue 82K000ANUS - 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