This link will provide more insight http://discuss.cocos2d-x.org/t/designing-for-iphone-x/39129/7 

I don’t understand SpriteBuilderX. 

Can you make tutorials about that.

My app is finished but I can uploaded that because the Iphone X resulution is not supportet :(

I will look into creating tutorials for spritebuilderX

Here is the solution for old cocos2d-x projects.

Maybe you can make a youtube video, how it works. And add it to your cocos2d-x youtube playlist. 

And post a link in this article.

http://discuss.cocos2d-x.org/t/iphone-x-full-screen-support-for-old-projects/40025/9

Will look into it