Hide custom column in admin template screen (Elementor) [closed]

Question

Use the second parameter $post_type passed to manage_posts_columns and ignore adding the column if it matches elementor_library:

add_filter( 'manage_posts_columns', 'customfield_add_column', 5, 2 /* <= Make sure you add the 2 here to pass the second parameter to your callback */ );

function customfield_add_column( $defaults, $post_type = null ) {
    if ( $post_type !== 'elementor_library' ) {
        $defaults['my_custom_field'] = __( 'MyField' );
    }

    return $defaults;
}