[jcims]

Would be difficult but interesting if they included proposed projects. There are 36 square km of solar farms planned in west central ohio that don't show here at all.

[zaik]

The data seems to be from OpenStreetMap. Features which do not currently exist are out of scope for OSM.

[seb1204]

Once under construction they can be added. See https://wiki.openstreetmap.org/wiki/Lifecycle_prefix

[tomrod]

It shouldn't be too hard to generate new geospatial layers if the data is available.

It's not on OSM to do so, of course, but it isn't infeasible.