The PDF Embedder plugin does not collect or save any personal user data about your site visitors. The plugin only provides the means to display an interactive PDF Viewer on your site.
The paid version does record the number of times a document is viewed and/or downloaded if you enable that option within the plugin settings and this is stored in your database as part of the documents metadata, but it does not record any information (name, email address, IP address, location, etc.) of the user that viewed/downloaded the document. The only values that are stored are integers.
So this makes the plugin fully compliant with all the General Data Protection Regulations (GDPR), as well as with the California Consumer Privacy Act (CCPA).