Welcome to the Community, @user32450 
Much as we’d love to share the timeline for the Quiz app, unfortunately, it’s hard to give any predictions at the moment.
The thing is that we consider ideas based on the number of votes they’ve received and their complexity. While this is the most popular app request on the Wishlist, Quiz app involves many complexities, which is why we are not able to provide the ETA now.
However, this idea is not abandoned and we hope the devs will be able to consider it in the future updates. If anything changes, we’ll inform you in this thread 