@Oma_Trisha I don't have a copy of Word in front of me and it's been a while. I recall a menu option to prepare the document for publishing that did things like purge comments. There's hope, I think.
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@Oma_Trisha different but sounds like it should work:
click a comment, go to Review on the ribbon, then click the dropdown arrow on the Delete button and click Delete All Comments in Document.
Once a comment is deleted, it's removed from the document permanently. The only way to bring it back is by pressing Ctrl + Z for Undo, if you haven't closed the document.
https://www.makeuseof.com/tag/how-to-remove-comments-in-word/