Hello,
You can find this option in Theme Options > WooCommerce > Shop > Product styles > Show Variations As Simple Products. Out of the box, WooCommerce variable product displays the select options on the shop/category page and customers have to go to the single product page and click the dropdown menu to see the variations, select one, and add it to the cart.
“Show Variations As Simple Products” option allows you to show every variation as a single product on the shop/category page. For example https://prnt.sc/12atvpi
Regards