Good afternoon, @toni_mardis...
I am not aware that you should be able to do a file preview within the Inbox of Canvas. In my own testing, I sent a message to a dummy student account with a JPG attachment similar to what you show in your screenshot. Then, I masqueraded as the dummy student to view the message in the inbox. The JPG image wasn't anything I could preview right within the message. I can click on the file to download it, but I cannot do anything to preview it. I am also using Google Chrome 86 for my browser. I also looked in my "Sent" folder after I sent the message to the dummy student, and the same thing happens there...not able to preview...just download.
I'm not sure if this will totally help to answer your question, but hopefully it will. Let Community members know if you have any other questions about this...thanks! Take care, stay safe, and be well.
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