Hi JM Lubecore, I hope you are doing good.
This should be caused because you are not including that field in the view. Have you tried using Advanced Find?
Here you can create a view and add entity columns so then when you export the content you will see that information included.
Here more info that can help:
Additional information that may help you:
Export data to Excel (Dynamics 365 Customer Engagement (on-premises)) | Microsoft Docs
If this do not help you, could you please provide more details?
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