Refer to this Eset knowledge base article on how to create Web Cam access rules: https://support.eset.com/en/kb7071-create-and-edit-webcam-rules-in-eset-windows-home-products .
Based on your screen shot, it appears you did this necessary step;
So there might be a bug in Eset Internet Security. I suggest you create an Eset support request about the issue.
You can add the app manually to Web Cam protection but you will have to add the full path specification of the app. Also, as I noted previously if Microsoft updates the app name or path specification, you will have to repeat this process again.