https://wccftech.com/hitman-3-players-wont-have-to-repurchase-hitman-2-on-egs-io-and-epic-confirmed/

Last Friday, HITMAN fans who play on PC were very disappointed to learn that they'd have to buy HITMAN 2 again on the Epic Games store even if they already had it in their library on Steam in order to access that game's levels on the upcoming third installment.

However, it looks like over the weekend developer IO Interactive and Epic Games (who has a timed exclusive for HITMAN 3 on PC) confirmed to have found a solution.