Explanation
Graphical user interface, text, application Description automatically generated

Step 1: Select an existing environment
Add a database in the admin center:
1. In the admin center, in the left navigation pane, select Environments.
2. Select the environment to which you want to add the database.
Step 2: Select Create my database
3. Select + Add database
Step 3: Configure currency and language settings
4. Enter the following, and then select Add.

Reference:
https://docs.microsoft.com/en-us/power-platform/admin/create-database