An Azure relational database service.
If you want, you can consider create a new Azure SQL logical server on the resource group and export the database as bacpac from the current logical server to the new logical server.
It should be possible to move the database with CREATE DATABASE AS COPY OF, I think. That command even permits you to move databases between tenants. See further https://techcommunity.microsoft.com/blog/azuredbsupport/how-to-copy-azure-sql-database-to-a-different-subscription-and-different-tenant/3965985