In Australia [1], a data provider (APVI [2]) collaborates to provide this data in the aggregate, and so it can be surfaced distinctly as rooftop solar. In the US, it manifests as reduced demand (“behind the meter generation”) during daylight hours.

[1] https://explore.openelectricity.org.au/energy/nem/?range=7d&...

[2] https://apvi.org.au/