evertech

Thank Rodrigo, that did it!
In case anyone needs to did something similar, here’s the code I used:

add_filter('post_class', 'set_row_post_class', 10,3);
function set_row_post_class($classes, $class, $post_id){
    
    // Make sure you're in the admin panel
    if (!is_admin()) {  
        return $classes;
    }
    
    // limit action to product table
    $screen = get_current_screen(); 
    if ('product' != $screen->post_type && 'edit' != $screen->base) {
        return $classes;
    }
    
    // Get stock status of the product 
    $stock = get_post_meta( $post_id, '_stock_status', true );
    
    // Add a class to the <tr> with the stock status
    $classes[] = "stock-status-".$stock;
 
    // Return the array with the classes
    return $classes;
}

Cheers
Roberto