Reply To: Variations Issue

Hello,

01. Go to Products > Attributes > edit Attributes and enable the option Change product image on attribute click.
Screenshot for clarification:
https://monosnap.com/file/hgPNvuGFvaSWFtvZp1wF8u7yxGqBhd

02 There is no option in theme settings available for that.You can try to find a plugin to achieve your purpose. We have not tested any to recommend.

https://wordpress.org/plugins/force-default-variant-for-woocommerce/

Best Regards.