@Heather1542 I've seen a few hosts mention putting stuff like that in their welcome baskets, but I've never seen it in any place I've stayed. Only the most dumb and lazy guests would assume that their accommodation will be supplying them oral care products, unless they're at a dental retreat.
But if your property happens to be in a very remote location with no shops nearby, it would make sense to supply more of the little essentials that people might have forgotten to pack.