How are levels for Super Mario Maker 2 licensed?

Update

As my understanding, if you use SuperMarioMaker2 to create a course but didn't publish it, you should still have right on your course.

But I am not a lawyer, my understanding could be wrong...

I didn't find the EULA either. However, I remember what Nintendo says at game beginning :

(translate from Chinese by my own)

Nintendo may take those course you created and published, directly use, or refine it, and sell them as part of future Nintendo games. Once Nintendo takes your course, we(Nintendo) will not pay anything to you, and you're not able to claim any reward.

So, I don't really care about if Nintendo takes my courses, I still enjoy on create/play/share courses to everyone. :-)