Is there any way in the Mist platform to schedule a reboot of the Juniper SSR device? I see that I can schedule a firmware upgrade, but not specifically a reboot.

Unable to schedule reboots

Currently, the Mist platform does not provide a direct feature to schedule a reboot specifically for the SSR platforms. While you can schedule firmware upgrades and control when the device reboots as part of that upgrade process, there is no separate option to schedule a standalone reboot through the Mist interface.