Welcome to the community.
You can search for trainers yourself here: WeMod - Browse All Supported Games.
For example: Mr. Prepper: Prologue Cheats and Trainers for PC - WeMod
All trainers need to be voted for in the WeMod desktop app.
Games are added to the WeMod library for voting when WeMod detects that enough community members have the game.
Never heard of the game so I looked it up. Looking at this game, it is basically just a rip-off of Fallout Shelter, which is also a free-to-Play game. (Fallout Shelter on Steam). But MrPrepper has more realistic graphics.
We do have a trainer for Fallout Shelter. (Fallout Shelter Cheats and Trainer for Steam). In case you want something similar to play while waiting for MrPrepper to get enough interest for a trainer. 