lin_rodri, did you copy your Epic installation of the game to Steam? Several people posted earlier the same problem as you in various sites (not only hitmanforum; unfortunately, most people did not update status later), and I have played the game’s “starter” version first on Epic (several times over several months in 2021 because Steam version did not exist) then purchased the game on Steam in 2022.
I copied the installation from Epic to Steam following this post from vlord
Side note: I do not have Epic launcher (or any game client) load at computer OS startup. So when the computer’s finished startup, I manually start Steam then choose Hitman WoA (no other shortcut for game). This may have no impact, but Epic does not update itself until I start it, and Hitman WoA has nothing pointing it to Epic.
Best regards.