Hello,
01. When using Elementor or WPBakery Page Builder, the slides will appear in the slider section. If you’re working with Gutenberg, you can access and adjust the slider settings directly within the Gutenberg editor.
Open the page in the WordPress editor (Gutenberg), locate the block that contains the slider, and edit it directly there.
See the Screenshot for a better understanding: https://postimg.cc/t1Zv5K8y
02. The product images are controlled by WooCommerce, and the WoodMart theme doesn’t influence this or the option in theme settings for optimizing images. The size of the thumbnail you set should be larger than the size of the product thumbnail displayed on the shop page. If the thumbnail size is smaller than what the default size expects, it may appear blurry or not display correctly.
You can find the sizes used on the demo here:
https://xtemos.com/docs/woodmart/faq-guides/image-size-content-alignment-product-grid/
Here is the WooCommerce Manual:
https://woocommerce.com/document/fixing-blurry-product-images/
Best Regards