The object type of the “brand” field is not valid

I’m using this code to set brand fields dynamically:

/**
 * Filter to add custom Brand for WooCommerce Products.
 */
add_filter('rank_math/snippet/rich_snippet_product_entity', function( $entity ) {
		 if (strpos(get_the_title( $post_id ),'Zippo') !== false) {   
            $entity['brand'] = 'Zippo';    
        } elseif (strpos(get_the_title( $post_id ),"Casio") !== false) {      
            $entity['brand'] = 'Casio';     
        } elseif (strpos(get_the_title( $post_id ),"Q&Q") !== false) {      
            $entity['brand'] = 'Q&Q';
		} elseif (strpos(get_the_title( $post_id ),"Seiko") !== false) {      
            $entity['brand'] = 'Seiko';
		} elseif (strpos(get_the_title( $post_id ),"Citizen") !== false) {      
            $entity['brand'] = 'Citizen';  
		} elseif (strpos(get_the_title( $post_id ),"Parker") !== false) {      
            $entity['brand'] = 'Parker';
		} elseif (strpos(get_the_title( $post_id ),"Blitz") !== false) {      
            $entity['brand'] = 'Blitz';
		} elseif (strpos(get_the_title( $post_id ),"Connoisseurs") !== false) {      
            $entity['brand'] = 'Connoisseurs';
		} elseif (strpos(get_the_title( $post_id ),"Li-Li") !== false) {      
            $entity['brand'] = 'Aros Abridores Li-Li';
		} elseif (strpos(get_the_title( $post_id ),"CH") !== false) {      
            $entity['brand'] = 'CH Aros Abridores';
		} elseif (strpos(get_the_title( $post_id ),"Spotify") !== false) {      
            $entity['brand'] = 'Spotify';  
        } else { 
            $entity['brand'] = 'Joyeria GyA';
        }
        return $entity;
		
	}
);

It’s a variation of the code that I found of your forum as a fix for custom brand:

/**
 * Filter to add custom Brand for WooCommerce Products.
 */
add_filter('rank_math/snippet/rich_snippet_product_entity', function( $entity ) {
		$entity['brand'] = 'Rank Math';
		return $entity;
	}
);

But the code is getting and error in Google search console: The object type of the “brand” field is not valid. I search in the code of the page and its setting the brand type as thing and not as a brand.