No pages are generated for existing issues when you define the rule. Pages are not generated until you make a change to an issue.
If you want to generate pages for all existing issues, you can make a change to the issues using the Bulk Change function.
Alternatively, you can use the ScriptRunner for Jira app. Using the built-in script "Generate events" you can create an "update" event for the issues. AutoPage will then create Confluence pages for the issues.

AutoPage does not copy attachments on the template page when generating pages. However, graphics can still be used by linking to the image file in the Confluence template.

You can add the graphics to the Confluence page as usual and use links to replace them.

To do this, select the graphic and select "Copy image address" from the browser's right-click menu.

Delete the image. Then select Insert Image from the Confluence toolbar. Now select "Images from the web" in the macro and paste the copied URL.

You will now see the image on generated Confluence pages.

The URL must be in this format: CONFLUENCE_BASE_URL/pages/editpage.action?spaceKey=SPACE&title=PAGE_TITLE

https://conjira.instawiki.com/pages/editpage.action?spaceKey=SAFE&title=$#{Key}+-+Epic+Value+Statement

If you define rule combinations that create pages with the same page title and the same parent page you will get an error that the page already exists and can't be created. To solve this you got to redefine the rules (e.g. create different page titles). Furthermore you got to delete the concurring pages and trigger the rule again.