https://creativethemes.com/blocksy/docs/woocommerce/floating-cart/
Floating Cart - Blocksy
The Floating Cart module from the Shop Extra extension gives your visitors a convenient way to add products to the cart without needing to scroll
floating cartblocksy
https://addonify.com/product/addonify-floating-cart-for-woocommerce/
Addonify Floating Cart For WooCommerce - Addonify.com
floating cartaddonify