Plus and Minus sign after adding one product to add to Cart

Try to follow the woocommerce documentation to add the quantity button on archive page – https://docs.woocommerce.com/document/override-loop-template-and-show-quantities-next-to-add-to-cart-buttons/

For the third party plugin related query, please try to contact their support. We can’t provide support for third party plugin. Hope you understand it.