Hi there,
Thanks for reaching out!
By default, WooCommerce breadcrumbs display the product category in the breadcrumb trail. Replacing the category with a custom taxonomy like “brand” would require custom code or a customization, which is outside the scope of our support in this forum.
If you’re comfortable with custom development, you could consider working with a developer to adjust the woocommerce_breadcrumb filter to customize the breadcrumb structure to your needs. You can find more information about WooCommerce breadcrumbs in our documentation here:
https://woocommerce.com/document/customise-the-woocommerce-breadcrumb/
If you need more in-depth support or want to consider professional assistance for customization, I can recommend WooExperts and Codeable.io as options for getting professional help. Alternatively, you can also ask your development questions in the WooCommerce Community Slack as custom code falls outside our usual scope of support.