History of scheduled event
For the maintenance that doesn't require a reboot, customers can know it only through Scheduled Events API.
Several customer requests easier way to grasp the affected resources and that history (e.g. dashboard).
Reading through this article it would appear that it is only available on VMs in Isolation or Dedicated hardware,
As an ICT service provider we have seen incidents where a non reboot task has left a VM unresponsive, an option to have these non reboot tasks sent to a team or support contact at either a subscription/resource group level would help identify cause faster and ultimately lead to more timely resolutions and RCA.