Devin White wears Douglas shoulder pads and has worn them since his college days at LSU. If you actually watch Devin White closely, you can sometimes see the yellow/purple accent pieces on his shoulder pads peeking out from under his jersey. Once White got to the NFL, he kept his exact LSU shoulder pads.
I can’t tell exactly which pair of Douglas shoulder pads these are, but they seem like one of the skill ones. They look very low-profile and provide lots of range of motion for the speedy linebacker.