echo '<pre>';
print_r($arResult['VARIABLES']);
echo '</pre>';
$arFields['PROPERTY_VALUES']['id свойства'] = [
0 => 'id значения свойства'
];
$propertyCode = 'ANOTHER_SPISOK';
$propertyValues = [];
$iterator = \CIBlockElement::GetList([], ['IBLOCK_ID' => $arFields['IBLOCK_ID'], 'ID' => $arFields['ID'], '!PROPERTY_'.$propertyCode => false], false, false, ['ID', 'PROPERTY_'.$propertyCode]);
while($row = $iterator->Fetch()) {
$propertyValues[] = $row['PROPERTY_'.$propertyCode.'_VALUE'];
}