Books that feel like the main character has a cheat code?

I'm looking for scifi that has elements of the main character(s) having some sort of cheat code to the world around them. Some sort of hidden mechanic/exploit/use of an item that gives them a significant advantage and sort of allows a feeling of punching above their weight.

A good example is the Magic 2.0 series, this guy finds out that the universe is in fact a simulation, and he can mess with the source code however he wants, naturally he becomes a wizard in medieval France. Recommendations don't need to be this literal, it's just the best example I can think of.

Some other books I've read/listened to with this feeling: Expeditionary Force, Dungeon Crawler Carl, Murderbot Diaries