Azure Data Studio is a data management and development tool with connectivity to popular cloud and on-premises databases. Azure Data Studio supports Windows, macOS, and Linux, with immediate capability to connect to Azure SQL and SQL Server. Browse the extension library for more database support options including MySQL, PostgreSQL, and MongoDB.
In SSMS you can add a new diagram and either:
This feature is missing from Azure Data Studio which is the most useful feature in SSMS when designing a new database.