@Ahmed Alshatawi, Thanks for posting in Q&A. Based on my researching, I find that there isn't a straightforward Intune policy or configuration profile specifically designed to force applications like OneDrive or Windows Update to appear in the system tray.
Meanwhile, from windows article, I find that the app visibility in system tray cannot be programmatically controlled. That is to say, we can't use to script to change it.
https://learn.microsoft.com/en-us/windows/win32/shell/taskbar-extensions#notification-area
The only method I can find is user changes it via UI. But the above article is long time not updated. You can contact windows support to double confirm if there's any method available now to change it via registry key or script. If it has now, we can deploy script via Intune to bulk change it.
Thanks for your understanding.
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