Yes , as Notion’s update replaces the use of databases with data sources in most endpoints, and they are separate entities (even if your database only has one data source).
Therefore you’ll need to update your components and select the appropriate data source when applicable.
I think String should be able to replace and reconfigure your existing steps just fine. I’m not sure it’s able to directly update them the same way you do in the workflow builder, but that shouldn’t be a problem