the answer was, “CorelDraw is not considered an industry standard software, but you may include the CorelDraw files in your downloads, however it should not be in your main file. You may check each category submission requirements to see which file formats are accepted, but generally for GraphicRiver, it is Adobe formats such as Photoshop, Illustrator and InDesign.”
I do not understand why software like Affinity Designer which is on the market since 2014 is in Graphics Files Included section and software like CorelDraw which is on the market since 1989 is not. CorelDraw is easy and simple to use, not just for vector graphics, you can do a lot of other things in Coreldraw.
The reason why I wanted to do print templates in Corel Draw and sell them on Graphicriver because I like to design.
Reading something like this at https://envato.com/#about
“We believe good ideas deserve a chance to grow.” We believe people deserve to earn a living doing what they love. "
It makes me sad