The V3 stalls are now numbered. Over in the transformer area - where the trench for the primary conduit goes - in the place where I think the primary conduit comes up, there's now a meter, and the meter is powered. What's confusing is that there's no evidence of a new transformer, the transformer nearby has been there for months. However, the V3 stalls were not lit up and the app still describes the site as 6 chargers up to 150 kW (I.e. just the pre-existing V2 superchargers).
(For some reason I can't attach images to this update, I'll try again later.)