Study folder issue?

I used to be able to click on my main folder that holds all of my flashcards and it automatically lets me run through all my flashcards in a randomised order, even if I stated it as a “good” or “easy” flashcard because I just want to go over them again before an exam. That’s completely gone now and I tried to reset my learning states individually to try and overcome this but for some reason I can’t find the button to do that anymore. Please fix this issue :(