1- Sorry to say, that there is no special widget for this, and changes require customization. If you want paid Customization services submit a customization request to WPKraken team.
2- Navigate to the Dashboard >> XSTORE >> Theme Settings >> WooCommerce >> Shop Elements >> Brands check the image: https://postimg.cc/qzq7tt7q
3- You can add a custom tab on your products. while editing a product in the [8theme] product options you will be able to add a new custom tab see image: https://postimg.cc/5j334rH1 set the tab title and content as per your need then save settings and check the product.
