No, we don’t have any plans at the moment to support AR Anchors (World Anchors) over Play to Device. Unlike the other AR features which kind of “passively” stream data back to the Editor, anchors require user input (placing the anchor) to work. It’s not impossible, but it’s harder to “slot in” among the other AR features we’re missing on Play to Device like Object Tracking.
With all of that said, please visit our roadmap and add AR Anchors over Play to Device as an “idea” so we can track it among other feature requests.