Are the values transferred when duplicating?
No, they are not transferred.
How does the sort field change when duplicating into the same placement?
The field sort remains the same — adjust it manually.
Does the name of the field change when it is duplicated?
By default, the field is duplicated with its name, but you can change any parameter directly in the duplication window.
Is it possible to duplicate a field in another table?
Yes, for this, select the target table in the duplication window.
Is it possible to duplicate a field within the same table and not change its name?
No. There cannot be two identical name in one table.
Is it possible to duplicate a field in another placement?
Of course!