Acceleration of Suguri 2 has a tutorial that is just 9 pages talking about the games systems telling you about how specific buttons are for what attacks and which button combinations and other stuff, but it never tells you what those buttons actually are, it just says they are the attack A, attack B, dash button, hyper button, super button. It took me an hour of playing the game to figure out what all of the buttons were.
This is super common with fighting games. The expectation is that people will be playing on all kinds of input devices, many of them custom. I wonder if part of it comes from the older game’s tutorials being written for arcade cabinets where that’s how the buttons were actually labeled