Firstly we need to allow for the extension on the server.
Within the Azure portal navigate to server parameters
Search for azure.extensions
Select which extensions to add
REMEMBER to save before exit!
Wait a short period while the extension is loaded onto the server..
Some points
Azure Database for PostgreSQL supports a subset of key PostgreSQL extensions as listed HERE. This information is also available by running SHOW azure.extensions;. Extensions not listed in this document aren’t supported on Azure Database for PostgreSQL – Flexible Server. You can’t create or load your own extension in Azure Database for PostgreSQL.
After extensions are allow-listed and loaded, these must be installed in your database before you can use them. To install a particular extension, you should run the CREATE EXTENSION command. This command loads the packaged objects into your database.
The extension(s) should now be listed against your database.
