Derick has posted an update 2025-05-13 January through May: Finishing the Initial Preview and the code is available in xdebug/xdebug and his personal fork derickr/xdebug.
I’m wondering myself. Has anyone tested the current development version in Flow so far? And are there plans to implement “Native Path Mapping” in Flow? I couldn’t find an issue or pull request on GitHub so far?