Epic makes over $5B/year — and more than $680 million of that is from the Epic Game Store [1], which has always been banned from iOS due to Apple's policies against alternative stores. Fortnite Mobile makes them good money, but it's not their cash cow — and if they can trade a temporary ban on Fortnite for their store running on iOS, it seems like they'll take it.

1: https://www.forbes.com/sites/mattperez/2020/01/14/epic-games...