Fortnite and Call of Duty are not great examples given they both still run on the PS4. Even the latest Call of Duty iteration that launched barely two weeks ago still runs on last generation consoles, because there's still so many players who haven't felt the need to upgrade to the successor generation after four years.
I don't think there's ever been a console generation before where the last generation was still getting big new releases this deep into the next one. The PS5 Pro is out now and the PS4 is still getting new games.