Hi @Mohammed OUAHI ,After extensive research and testing, this process is complex and currently there is no direct way to implement it. There is a workaround for your reference:
First, use PowerShell to obtain the usage of the specified Content Type, but currently it can only be obtained at the List/Library level. It is recommended to use PowerShell to find which libraries use this Content Type, and then manually export to Excel. Merge all Excel files and select the files using this Content Type.
Reference:
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Then, use PowerShell to import the organized files, iterate through all files, get the metadata of the files, and then export the results to a csv file.
Reference:
https://www.sharepointdiary.com/2018/03/sharepoint-online-get-file-properties-using-powershell.html
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Finally, organize the csv file and import it to a blank SharePoint List.
If you feel that this is not satisfactory to you, you can go to the Partner Center to get a better solution.
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