In Luke Cage Season 2, the detective Brigid O'Reilly, a major character in Cloak & Dagger, is mentioned.
O'Harran's Scotch Whiskey, previously seen in Cloak & Dagger, was seen in Daredevil: Born Again.
In Wonder Man, DeMarr Davis / Doorman gains his teleportation abilities through a dark substance originating from the Roxxon Corporation. This same corporation was the main antagonist in Cloak & Dagger Season 1, where its experiments and an explosion on an oil rig granted Tyrone and Tandy their powers.