Astra Pro lets you add beautifully designed quantity buttons for the WooCommerce quantity input box on the product page. You can easily add plus, minus buttons for the WooCommerce Quantity Input box everywhere, such as Single Page, Cart page, etc., with a custom design.
While building your eCommerce website with Woocommerce and Astra Pro, you will notice the Misc module. Under this module, you will find an option to enable Product Quantity (Plus-Minus).
Navigate to Appearance> Customize > Woocommerce > Misc > Quantity Plus and Minus
Using this option, you can update the quantity of the products directly from the product page. This option comes with three different layouts that you can choose from. Have a glance at the below-attached video to get an idea of how it works on the front end.