[ENH-000113280: Request to adding the functionality to insert object linked from Microsoft Office applications in ArcGIS Pro] is marked as Not In Current Product Plan. Here is the public explanation:
Currently, there are no plans to support OLE (objects linked to MS applications) in ArcGIS Pro.
To support workflows that previously depended on OLE we are focusing on making improvements from within Pro. For example, we have added an improved table element and are working on improvements to formatting when using copy and paste into text elements from Microsoft Word.