Lenovo Legion 5 15 inch - DIY adding an internal SSD - YouTube
Lenovo Legion 5 Pro 82JS0052PH Ryzen R7-5800H 16GB 1TB SSD RTX3050Ti o – EasyPC
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