Exploratory supports importing data from BigQuery using a Service Account.
If you have followed the steps in the link above to set up your BigQuery connection but find that no projects appear in the Project dropdown list, please check your version of Exploratory.
If your version is older than v14.5, this issue is likely caused by a known bug that has been resolved in more recent releases.
Please update to the latest version of Exploratory Desktop and check if the project list is now displayed correctly.