@sashamitrovich
Check your permissions to see the documents. Your user must have 2 roles:
Either data-explorer-search-role or data-explorer-wizard-role
Role or Permissions to view documents in the target database.
Upcoming release with should document counts on the database based on your permissions which should be helpful.
To create a query: I'm picking the right database and searching for a collection I know exists but nothings gets found. What am I doing wrong?