If a player uses Cheat Engine to change that "5,000" number on their screen to "1,000,000," it is purely visual. You can go to the store, "buy" an execution, and your client will play the animation. But the moment the game attempts to sync with the server, the transaction fails. The server checks its records, sees you only have 5,000 steel, realizes the purchase is impossible, and reverts the action. When you restart the game, you are back to 5,000 steel—and you don't have the execution.

: Participating in any multiplayer mode (Dominion, Breach, etc.) rewards small amounts of Steel based on performance and match length.

A "Cheat Engine Table" is a script file used with the open-source software to modify a game’s memory while it is running.

The Iron Price: Investigating the Risks of 'Verified' Cheat Engine Steel in For Honor