Subject Area - How to add the attachments field in a report

Summary:

How to add the attchament field in a report made through the subject area "Sales - CRM pipeline"

Content (required):

We want to add the attachment field in a report because we need to control the files that our team upload in each opportunity. We are using the subject area "Sales - CRM pipeline" but we could not find any field with this propuse. 

Please your comments if you know other way to do this

Version (include the version you are using, if applicable):

22D

Code Snippet (add any code snippets that support your topic, if applicable):