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 2020 Premium Gaming Laptop I 15.6 inch FHD IPS 120Hz I AMD 6-Core Ryzen 5 4600H I 32GB DDR4 1TB PCIe SSD 2TB HDD I NVIDIA GTX 1650 Backlit