
Is there a way to link up with a My Nintendo account so we can have the same wishlist on here and there?

This would be great to have some sort of synchronization between the two. I doubt however that there is any user-facing API from Nintendo to allow this
Just clear your Nintendo Wishlist and never touch it again, it is just bad.

The issue with that logic is well, you might find a game on your console and don’t currently have access to Deku Deals, the on console wishlist is still useful when you are actually browsing on your console