Hello,

Thank you very much for choosing our theme and for contacting us.

Please check this manual: https://xtemos.com/docs-topic/variable-products-and-swatches/

First of all, you need to create variable swatches, then you will be able to show them in the grid. You can find the option in the Theme Settings > Shop > Variables.

If you have any questions please feel free to contact us.

Best Regards