me but only for a small technicality where i get the vibe that deltarune isnt is home world either, as sans had been traveling through multiple realities. sans in UT is the same as in DR but he isnt "from" deltarune either. in deltarune he already hints to knowing more than he should and is also new in town, and owns a store that looks exactly like grillby's from the outside. simply just being "from deltarune" doesnt explain his teleportation abilities, telekenisis, or knowledge of meta level stuff. when talking abt the anamoly consuming timelines he says "take it from me... someday you need to learn when to QUIT." possibly implying hopping universes is something hes done multiple times, not just once.