You configure rollout options when creating Feature Updates policy by selecting one of the following options: After a device completes the update, it is then dependent on user behavior and other settings like Deadline.
When the need for an update is confirmed and the device is eligible, the Windows Update service then offers the update to that device. Before a device can install an available update, the device must connect to Windows Update and scan for updates. Instead, when an update is made available, the device becomes eligible to install it. This doesn’t mean the update will install right away. The default behavior for Windows Update is to make an update available to an assigned device right away.