I'm eyeballing the slot, and it'll support NVMe most likely
Zooming in a little on the slot

There's a single notch there, which looking at wikipedia's page on M.2, corresponds to a M-Key. Its possible this slot would work with a sata drive as well, but its designed to fit an NVMe drive. There's also a few people who have tried this - this youtube video from Viorel Caia shows the upgrade being done, and there's a few folks who report it works for them
So looking at everything the slot physically and electrically should support a NVMe drive