Hi Mohammad,
Thanks for checking in on these topics!
Regarding question #1, there currently is no way to automatically export all the scenes in a course individually. You can do that manually! Here's a short video on how to do that!
Export Individual Scenes
Regarding question #2, there also is no way to add a slide to the end of each scene automatically. Copying and pasting the slide is the best way to get that done.
The best way to possibly see those features added is to submit a feature request. You can submit one here. If the request makes it onto our feature roadmap, we’ll make sure to update you in this conversation.