Where does Epic Games Launcher store the game data?

The question may be a bit stupid. Here is the explanation:

I know that Fortnite's data is stored on the servers. So that you can, for example, Log on to any PC and continue playing with the same score (but it's also an online game)

The question is, however, where the data will be stored by third parties. Locally or on Epic Games servers?
→ So if I buy a game on Epic Games and want to continue playing it on another PC or uninstall it in the meantime, does the data stay or not?

Yes everything stays