Although hovercraft plays an essential role in the lore of the Cyberpunk universe, it was actually revealed well before the launch of Cyberpunk 2077. These would not be present in the game as drivable vehicles.
They still appear in the game, though, both as a key part of some world events and even in some quests that use them as a means of transportation for the players.
Source: N4G PC How To Access Flying Cars in Cyberpunk 2077