@Ronald Soulliard Thanks for posting in our Q&A.
For this issue, if some devices didn't show the install status, it means that these devices didn't get this app or it haven't reported the install status to intune.
It is needed to check these devices one by one to find the cause. For example: if a device doesn't have network or haven't checked in for a long time, intune can't get report from this device.
Hope it will clarify something.
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