expansion slot

I have a Crosshair VIII Hero running a Ryzen 5950x with a 3090 in PCIe slot 1, two M.2 drives onboard (one in PCIe mode), and USB3 card in the PCIe 1x slot if I add a sound card to PCIe slot 3 (the one closest the edge of the board) will PCIe slot 1 still run in x16 mode?

Hello, I ordered this laptop recently and I can't find any information on if it has an NVMe expansion slot. Does anyone know if it has an NVMe expansion slot? Link to laptop in question: https://bit.ly/3nM3BBN