Reference for child elements

Here is my simple task:
I need to create an element which will have child elements.
My problems:
In order to write a reference into a child element, i’m must first write the parent element. I didn’t understand how to do it.
As an alternative way, I wanted to immediately record the parent element on creation and then open it to the user. There is a strange glitch. If I add the FIRST entry, the recorded element does not open, but starting from the second, everything goes fine.

it’s a first click

next click

is It correct?
What am I doing wrong?

With you add row —> show edit screen, the edit screen you’re showing is the screen you’re on, not the one you just created.

Better option, if possible, is to use a form screen to add the items and then do a show edit screen as the on submit action.

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