Inside Lenovo Legion 5 Pro (16") - disassembly and upgrade options | LaptopMedia France
Lenovo Legion 5 Pro 16ACH6H Gaming Laptop - Ryzen 7, UK | Ubuy
Legion 5 Pro Memory Upgrade - YouTube
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