format date

// By using class, we replace specified text with the formatted date.
add_filter( 'render_block', function( $edited_date, $block ) {
    $field_name = 'latestupdate'; // ACF field name
    $postId = false;
    $format = 'F jS, Y'; // date format
    $class = 'displayDateUpdated'; // Additional CSS Class on block to find
    $string = 'LastUpdated'; // string of text to replace with date
    $date = get_field( $field_name , $postId, $format );
    if (
        !is_admin() 
        && ! empty( $block['attrs']['className'] )
        && $class === $block['attrs']['className']
        ){
            $edited_date = str_replace( $string, $date, $edited_date );
    }
    return $edited_date;
}, 10, 2 );