In the Power Platform Admin center you need to check two things
1) Make sure a Dataverse database has been provisioned for the Environment. When you look at the details of the environment you'll see a section on the right side that shows the database or gives you a link to create one.
2) The other spot to check is on the Resources Dropdown in the Environment. You should see an entry for Dynamic 365 Apps.
----------------------------------------------------------------------------------
If this Post helped you, please click "Does this answer your question" and give it a like to help others in the community find the answer too!
Paul Papanek Stork, MVP
Blog: https://www.dontpapanic.com/blog