Show data by groups? Accordion? Expanding Rows? Don't know what to call it

yes, but modal isn’t the point.

i don’t know how much time i’m supposed to piss away trying to get this to work.
its the same old thing - outdated docs.
frigging wasted about hour trying to get this to work.
per this doc: Nested Repeat Regions
i’m at this step:
image

I cannot insert anything “INTO” my repeat area.
So I can’t complete the final step.
Tried over and over and different - and over - same thing as many others before… who, unfortunately for them, say they’ve been working on it “for days” - poor bastards.

here’s my tree:
image
same as in the docs, but no way to add INTO the repeat.

done for the night