Hi Nadeem –
I am not sure if anyone has gotten back to you. Thank you for bringing this to our attention: we always value feedback from our customers.
We have determined that DynVPN does support SRX chassis clusters and we have revised and reposted this topic.
You can also use PathFinder to view platform and release support for the various Junos features. Please see: https://pathfinder.juniper.net/feature-explorer/. You can search by product, Junos release, or feature. In addition, you can compare products, software releases, or features. Because PathFinder is available on juniper.net, it is open to all. PLM provides the data used by the Pathfinder application.
Thank you again for your feedback,
Victoria Payne