Hello,
Unfortunately, there is no option in Theme Settings to display select quantity button with all the add to cart button on the website.
The default WooCommerce does not provide such an option and our theme does not either. A user can add to cart just from the product grid, add all the products he needs and then set the necessary quantity in the shopping cart or in the single product page there is an option to select quantity.
You can try adding any third party plugin that better meets your requirements.
Best Regards.