Yes, I added a method on PCGamingWiki some weeks ago because I was wondering the same thing :
https://www.pcgamingwiki.com/wiki/Hitman_3#Start_the_game_in_standalone_mode
It’s a shame that we don’t have an easier way to do it, like Steam does, but that’s how Epic handles online tagged games unfortunately. An alternative is to use Legendary (Epic Games Launcher alternative) like that :
legendary launch Eider -SKIP_LAUNCHER --offline