Can I make so when I press a button on my Arduino Uno board, it will press a key on my computer? I looked up the question before, but they only gave answers for boards that are not the Uno. Is there any way to make it so when I press a button on my board, it registers as a key press on my computer? I'm trying to make a flight controller for PC sims.

Thanks!
Not without extra software on your computer side.

However if you use Arduino Micro, you can emulate keyboard and/or mouse directly.