Maps, warframes, weapons and skins will also likely be loaded as needed, so you’ll probably start with 20GB but bloat to 60 as you play
Another trick I noticed playing CoD mobile is that they don’t load every other player’s skin, only the latest. So if your install doesn’t have it, it only display’s the default skin for other players. Which also mean that the skin you paid 60$ for in the last Season Pass is only visible by a few players.