Reply To: Product Page Set up

Hello,

Try to add the following code snippet to the Custom CSS area in Theme Settings to remove uncategorized and sku

.sku_wrapper,
.posted_in,
.cat-item.cat-item-56 {
	display: none!important;
}

Here are articles how to customize product tabs and about related products
https://docs.woocommerce.com/document/editing-product-data-tabs/
https://docs.woocommerce.com/document/related-products-up-sells-and-cross-sells/

Regards