how can i create a menu drop down that shows brands in store

Hello,

Thank you very much for choosing our theme and for contacting us.

Please check this manual to create a mega menu block: https://xtemos.com/docs-topic/create-mega-menu/

The HTML block (custom post type used as a mega menu) is provided here: https://xtemos.com/docs-topic/html-blocks-usage/

You can insert any widget into HTML block, including Brand widget: https://xtemos.com/docs-topic/elements-and-widgets/

Best Regards