The CW renews 10 shows:

The CW has renewed Arrow (Season 8; as we first reported), Black Lightning (Season 3), Charmed (Season 2), Legends of Tomorrow (Season 5), Dynasty (Season 3), The Flash (Season 6; as we first reported) , Legacies (Season 2), Riverdale (Season 4) , Supergirl (Season 5; as we first reported) and Supernatural (Season 15; as we first reported) for 2019-2020 season.

Source: TVShowsCancelled