I have Version 26.2.0.186 and Build 186.2220
In https://docs.oracle.com/en/database/oracle/sql-developer/26.2/rptug/sql-developer-concepts-usage.html#GUID-A1A9E32C-A1E8-4650-A0FE-E33CB02C17C4
- If you right-click a table in the diagram and select Show Parent and Child Tables, any parent and child tables are added to the display (if they are not already included).
But I don't see Show Parent and Child Tables
In my diagram, I know the parent tables of the selected table do not show.
