Is it cheating to plug-in a controller? Like, playing on keyboard and mouse while having a controller connected. I found out some benefits on having it.

its up to the mods and it depends on how big of an advantage it gives

What kind of advantage are we talking about, though?

In The End, it allows the player to consistently bug in the vents, so the game doesn't automatically enter in a state where it's crouching, and you can simply run, saving a ton of time.

Example:

happens on mobile aswell

Idk if you saw the message but its banned just so yk