There's no fall damage. Those who have experience in the Battle Royale category have actually more than likely tuned themselves to dealing with surface very thoroughly. In the bulk of other games in the category, fall damage is suffered when dropping from a great height, however that's not the case in Apex Legends. You can jump off a large cliff and arrive on the ground listed below without even a scratch. If your challengers are placed listed below you, a convenient tactical benefit.