I think the idea of Wild Talents originated in DS, not 100% sure of that.
Outside chance this is for the Eberron or FR books instead.
Eberron is the other setting where Psionics plays a major role, and FR is probably the midway point between DS & Eberron on one side and DL, GH, BR on the other. It's not important to the setting, or as common, but FR does gave significant Psionic Lore, such as Ancient Jhaamdath, and a bunch of psionic characters in the novel, plus BG3 might have amplified the influence of Psionics in the setting (the tadpoles functioning as a kind of Psionic Gesalt class).
The only thing that sticks out as being unDS in flavour about the UA, is that piece of Artwork which looks very un Dark Sun like.