When you deploy a new environment there is no data in any of the new tables, that is also the case when you select to deploy some sample and Dynamics 365 apps. But loading sample data is very easy and is done in a few steps via the environment settings.
Go to the Power Platform admin center, select your environment and click the settings button in the top toolbar.
From the settings page open the “Data management menu” and select “Sample data“
You can check the environments capacity to see if the data has been loaded