Embedded files in Office files

Hello everyone,

Would like to now if there is any way we can look for the content in the office files(docx, pptx, xls) which has embedded files in it. 
In my case i have shared the word file classified as public to my personal id and the PP object embedded is classified as confidential.

Example : Word ->insert->Text: Object-> create from file

Can Purview DLP, Auto Classifier,  Exchange online any other solution has any capabilities to look and indicate any object/embed files within a file.