Transferring data from a parent table to a child table

[C2]

In a table, I have created a virtual column of type 'List' with the following formula: Ref_Rows("ChildTable", "ExChildColumn").

If "Add" a line and create a new row from the parent table to the ref child table, AppSheet uses the 'ExChildColumn' to set the Ref ID with a UniqueID.

Is it possible to use data from the parent table to set the Ref ID of the child column?

Is it possible to copy a cell from the parent table to a column in the child table?

Thanks