Excel Export with Date Column

class MailchimpExport extends Exporter
{
    protected static ?string $model = EventAttendance::class;

    /**
     * Export columns.
     */
    public static function getColumns(): array
    {
        return [
            ExportColumn::make('attendee_email')
                ->label('Email Address'),
            ExportColumn::make('attendee_name_first')
                ->label('First Name'),
            ExportColumn::make('attendee_name_last')
                ->label('Last Name'),
            ExportColumn::make('attendee_company')
                ->label('Company'),
            ExportColumn::make('attendee_title')
                ->label('Title'),
            ExportColumn::make('get_profession.title')
                ->label('Profession'),
            ExportColumn::make('pronouns')
                ->label('What are your pronouns?'),
            ExportColumn::make('event.chapters')
                ->label('What groups are you interested in hearing about?')
                ->formatStateUsing(function ($state): ?string {
                    return implode('; ', $state->pluck('title')->toArray());
                }),
            ExportColumn::make('eventbrite_order_timestamp')
                ->label('Test')
                ->formatStateUsing(function ($state): ?string {
                    return $state->toISOString();
                }),
        ];
    }