Hi swatch,
At the moment, the theme does not support to show the add to card button on front page.
To show this button, you can add the following code to the functions.php file of the theme:
add_action( 'after_setup_theme', function(){
add_action( 'woocommerce_after_shop_loop_item', 'woocommerce_template_loop_add_to_cart', 7 );
});