Problem: You want to export content to translate using XLIFF, but you can't find the option in the translation management. Solution: We recommend following the steps outlined in the WPML documentation to export your content in XLIFF format. You can find the detailed instructions on how to do this by visiting the following link: Export whole site content as XLIFF for external translator.
If this solution does not apply to your case, or if it seems outdated, please do not hesitate to open a new support ticket. We also highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. For further assistance, you can always contact us through our support forum at WPML support forum.