WC Fields Factory – field have an option for variation product. In variable product can choose field group for each variation.
How to get variation product field on product page?
Create new fields group or go to older group, On condition meta box. Choose ‘Product Variation’ in first select option, select rule in second option and select product variation on last selection, If you want filter product select above field.
How it works?
In product page customer if select variation field will show.