‎XPS 8950, can WiFi slot used for NVMe?

Yes I recommend the Sintech M-Key Key E Module,NGFF WiFi Card to Key M Adapter Card enter image description here

2 That wording appears consistent with the motherboard's manual, which says, The vertical slot allows you to install an M

m2 expansion slot PRIME B550M-A WIFI II features dual , PCIe , MediaTek Wi-Fi 6, 1 Gb Ethernet, HDMI, DVI-D, D-Sub, USB Gen 2 Type A, and Aura Sync

m2 slot mainboard I am using the Accelerator A+E key in the Wifibluetooth slot on the motherboard