Welcome to the community. 
Roughly 8 out of 10 Steam trainers work on the Epic Games version of the game and vice versa. Have you tried pressing the fix button in the Steam trainer and manually linking the Epic version’s .exe there?
Other than that, we don’t take trainer requests here in the forum. See this recent post, which explains how trainers are made or updated: Vampyr for Windows suggestion - #2 by Ravenfyre.