Hi rahmat.wpdev,

Thanks for reaching to us and appreciate your patience.

1. You can use WooCommerce builder of WoodMart allowing you to create custom templates for product pages and other functional pages that are not editable by default https://prnt.sc/YTiRtEcPJPCo > then you can use these filters widget to add into the Layout https://prnt.sc/Mbb-IxSEHVC0

WooCommerce builder is the inbuilt functionality widget included in the builder you use on the site. You can create a custom layout in the page builder as per your need.

Here is the documentation:
https://xtemos.com/docs-topic/woodmart-woocommerce-layout-builder/

2. Please add the following Custom CSS code to Theme Settings > Custom CSS > Global Custom CSS:

.whb-sticked .whb-color-dark:not(.whb-with-bg) {
    background-color: #000;
}

3. Sorry but there is no option. You need to find a third party plugin to achieve more functionality that best suits you.

4. Product tabs

There are 3 default tabs of WooCommerce:

+ The Additional Information Tab: Shows when the Attributes are added under a Product. If the Attributes are not added then the Additional Information tab doesn’t show.

+ Description Tab: This is the main description on the product page. Please enter the product and make sure you have added the content.

+ Reviews: Used to show customers’s reviews.

If you want to add additional tabs for specific product, you can add Tab via Product Setting https://prnt.sc/exIlSVXRC9_d

You can use Product tabs widget to display Description and Product attributes (Additional Information). Disable Reviews option. https://prnt.sc/5-S-SyfgA9FO

If you want to display custom attributes, which are separate Product > Attributes, you can create custom table via HTML Block > select via Custom Tab in Product Settings.

Navigate to Theme Settings > Shop > Single Product > Tabs. In the Additional tabs, you can remove Table title, Content to disable these https://prnt.sc/aiddjA_pEWmR

Regards,