You can show 3 types of variants on the product page. Choose what is relevant to you:

 

 

Show your variants as images. So you choose the variant image, so you indicate which colors (for example) are available.

 

If you look at the images / variants, in the backend of a product, you can click on '+' there, and then choose the matching image variant. Easy! If you don't link an image, it shows the variant name in the block. That is not so nice, but it is no different.

 

 

Show your variants classic as a horizontal dropdown.

 

 

See immediately which variants are available with a horizontal scroll.