Reported by Google Scholar after reviewing indexing on https://dspace7-demo.atmire.com/
Currently, the "citation_pdf_url" returns the REST API URL where the PDF can be downloaded, for example:
<meta property="citation_pdf_url" content="https://dspace7.4science.cloud/server/api/core/bitstreams/6260ead5-90d6-405c-a524-f4a254c0bf10/content">
This will cause SEO issues if the REST API and Angular UI have different hostnames (which is what exists on our demo site). In order to avoid this, we will need to provide a Angular UI URL that is essentially a "pass through" to the backend to download the PDF. So, it could be something like "https://dspace7-demo.atmire.com/bitstreams/6260ead5-90d6-405c-a524-f4a254c0bf10/content"