Hey @VinceKung.
Yes, that’s probably why the trainer is called “Fallout 3 Cheats and Trainer for Steam”.
Also, this is the trainer for the standard edition of the game. The Fallout 3 game on Epic is the Game of the Year version.
Here you go: Fallout 3: Game of the Year Edition Cheats and Trainer for Epic Games.
WeMod automatically selects the correct trainer for you - so let it rather than manually searching.