You can also review the modeler's development database. From the modeler, go to the Console tab and click Advanced -> Start built-in database viewer
Would using the Excel Exporter be an idea? With the module you can create as many custom Excel templates as you want and you'd be able to access all your data and even export it to Excel.
If you are using the standard cloud you could download and restore the postgres database to your local machine. I always inspect my postgres database to see what ends up in the database.
odata is another option. Also accepts queries/ filters in the query string.