Just for information, today I got the follow message from Synology development:
It has been quite a while since we last disucss about the release for DSM7, and I’m wondering if everything is going well : ). We predict that most of our users may gradually upgrade their DSM to the latest version, and hope that their user experience will be the same as DSM6. Therefore, we hope that the Syncthing package may be available on DSM7 before the official release date, that may likely fall on 2021 Q2. If you have any questions during developing the package, or any questions about the development guide, please don’t hesitate to contact me.
Thanks for your support as always : )
P.S. The attached is a revised and updated developer guide that has fixed several documentation bugs.
So it means the planning is latest end of june 2021 zu release Final of Synology DSM 7. For information also the current developer guide DSM7_developer-guide-ex.pdf.