add columns for displaying start time and end time in Event Espresso 4 CSV registration report

ee_add_start_end_time_columns.php

<?php
//* Please do NOT include the opening php tag, except of course if you're starting with a blank file

add_filter( 
    'FHEE__EventEspressoBatchRequest__JobHandlers__RegistrationsReport__reg_csv_array', 
    'ee_add_start_end_time_columns', 
    10, 
    2
);
function ee_add_start_end_time_columns( $reg_csv_array, $reg_row ) {
    $time_format  = get_option( 'time_format' );
    $ticket_model = \EE_Registry::instance()->load_model('Ticket');
    if ($reg_row['Ticket.TKT_ID']) {
        $datetimes_strings = array();
        foreach (\EEM_Datetime::instance()->get_all_wpdb_results(
            array(
                array('Ticket.TKT_ID' => $reg_row['Ticket.TKT_ID']),
                'order_by'                 => array('DTT_EVT_start' => 'ASC'),
                'default_where_conditions' => 'none',
            )
        ) as $datetime) {
            $datetimes_starts[] = \EEH_Export::prepare_value_from_db_for_display(
                \EEM_Datetime::instance(),
                'DTT_EVT_start',
                $datetime['Datetime.DTT_EVT_start']
            );
            $datetimes_ends[] = \EEH_Export::prepare_value_from_db_for_display(
                \EEM_Datetime::instance(),
                'DTT_EVT_end',
                $datetime['Datetime.DTT_EVT_end']
            );
        }
    } else {
        return $reg_csv_array;
    }
    foreach (array_combine($datetimes_starts, $datetimes_ends) as $datetimes_start => $datetimes_end) {
        $starts[] = date_i18n( $time_format, strtotime( $datetimes_start ) );
        $ends[] = date_i18n( $time_format, strtotime( $datetimes_end ) );
    }
    $reg_csv_array[ "Start Time" ] = implode(", ", $starts);
    $reg_csv_array[ "End Time" ] = implode(", ", $ends); 
    return $reg_csv_array;
}