Yada

This simple plugin change div html of single product page to always display add to cart button, even if customer didn’t choose some variation option.

WooCommerce Aways Show Add to Cart

Nabil Lemsieh

The “Conditional Add to Cart” plugin allows you to control the visibility and behavior, as well as customize the appearance and content of the “Add to cart” button in WooCommerce based on a set of conditions. This gives you greater control and flexibility over how the button behaves and appears in your WooCommerce store.
You can trigger actions such as disabling or enabling the button, or changing its text and appearance. You can even replace the button entirely with your own custom HTML or shortcode.
NOTE: More conditions and actions will be added in future updates, so if you have any feedback or feature requests, please feel free to share them on <a href="https://wordpress.org/support/plugin/conditional-add-to-cart" rel="ugc">our forum</a>

Conditional Add To Cart for WooCommerce

Conditionally control the visibility and behavior, as well as customize the appearance and content of your "Add to cart" button in WooCommerce.

WooCommerce Aways Show Add to Cart vs Conditional Add To Cart for WooCommerce