I don’t get how you use rewind, can someone help me?
Thanks in advance for helping with such a dumb question! 
The default hotkey is the ‘r’ key on your keyboard. While playing, hit it. If it doesn’t do anything, go to settings > frame throttle > rewind and make sure it’s not OFF. To put it on a controller button (I like to use R3), go to settings > input > hotkey binds and bind rewind to one of your gamepad buttons.
A few cores don’t like it, so if you get weird/poor behavior, you might need to disable it. Whether it’s on or off should be manageable with core overrides.
Thanks for the great answer! 