@DE5 

Some recent updates moved comparison features into the SQL Editor side panel or rely on “Cell Actions,” where you can generate code or format it and then see differences before applying changes

https://www.databricks.com/blog/introducing-new-sql-editor

https://www.databricks.com/blog/5-tips-get-most-out-your-databricks-assistant

Another option to consider:
Customize Assistant responses using /addInstructions to ask explicitly for line-by-line change descriptions, if direct side-by-side view is unavailable
https://learn.microsoft.com/en-us/azure/databricks/notebooks/assistant-tips