TYPO3 FlexForm - RTE Text editor Field

You can use below code to get RTE Text editor field in TYPO3 Flex Form :

<label>Textarea</label>
<config>
  <type>text</type>
  <cols>24</cols>
  <rows>3</rows>
  <defaultExtras>richtext[*]:rte_transform[mode=ts_css]</defaultExtras>
</config>