Search and replace by creating new row?

If I use regular expressions in search and replace, I can insert a \n to create a new line. That’s useful in many cases. What I want to do this time though is create a new row in the outline, not just a new line within the row.

Is there a way to do that?

I don’t think you CAN use regex to insert a new line. Have you been able to do it? Doesn’t work for me.