Windows 11 Upgrade mit Intune

I used Intune (Feature Update) to upgrade  from Windows 10 to Windows 11. For some devices, the update was completed within 12 hours. However, there were also devices that took 48 hours or longer to update to Windows. In the meantime, I carried out software installations (via Intune) on the devices within an hour.

How can I force the feature update? Especially for new devices?

Thank you for your support

Stefan