1. add slides /banner to single product page

Hello,

Try to use the Theme’s Layout Builder, you can create Custom Layouts for WooCommerce pages like Shop, Category, Single Product page, Cart, and Checkouts and for portfolio pages. You can use that to create your own custom layouts for a single product page and add the slider.

Further, you can read more about the Layout Builder here: https://xtemos.com/docs-topic/woodmart-woocommerce-layout-builder/

Best Regards,