change category taxonomy for brand cpt

add_filter(
    'the_category',
    function ( $thelist, $separator, $parents ) {
        if ( 'brand' !== get_post_type() ) {
            return $thelist;
        }

        $brand_categories = get_the_term_list( get_the_ID(), 'brand-category', '', $separator );

        if ( empty( $brand_categories ) || is_wp_error( $brand_categories ) ) {
            return $thelist;
        }

        return $brand_categories;
    },
    10,
    3
);

add_filter(
    'jnews_get_primary_category_filter',
    function ( $category_id, $post_id ) {
        if ( 'brand' !== get_post_type( $post_id ) ) {
            return $category_id;
        }

        $brand_categories = wp_get_post_terms(
            $post_id,
            'brand-category',
            array(
                'fields' => 'ids',
            )
        );

        if ( is_wp_error( $brand_categories ) || empty( $brand_categories ) ) {
            return $category_id;
        }

        return (int) $brand_categories[0];
    },
    20,
    2
);