Options not showing on product variations

I noticed someone posted this question 3 weeks ago but the reply was taken offline.

I am having the same issue. See example: https://shop.itsyourbusinessatl.com/product/piston-liner-set-2000/

Note: have set up individual skus for each option and included in product list in EPO plugin, still not showing. Thank you

The page I need help with: [log in to see the link]