I see the note on the relation now.

Maxar Premium -and Esri- in iD show work has started -though no building construction yet- on the eastern half of the site (you can see a digger at work north of the proposed road).
(newer Sentinel-2, which we can't use, shows work has been continued and construction may have started);
https://wiki.openstreetmap.org/wiki/Sentinel-2
Unfortunately I could not find any articles or posts which talked specifically about construction on the site, which could be used as reference.

I would personally leave this as construction now and remove the note from the relation, until future imagery or survey shows whether work has continued or been abandoned.