@J-3804. Thanks for posting in Q&A. For LOB, it didn't find the option to configure reboot after the app is installed. if the app itself has the option to restart, it will do after being install or ninstalled.
https://learn.microsoft.com/en-us/mem/intune/apps/lob-apps-windows
For Microsoft Store new, it only has the option to set Restart grace period. So the restart action still depends on the app itself.
I don't find any built-in policy to control the app restart. But I find we can force device restart in Win32 app under "Device restart behavior". Maybe you can consider deploying the app via win32 type.
https://learn.microsoft.com/en-us/mem/intune/apps/apps-win32-add#step-2-program
Hope the above information can help.
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