When selecting dynamic content as the result of an action step in a flow, you'll get a list of the available properties. First of all, this list is not sorted in a logical way. Nor alphabetically, nor based on its hierarchy.
Lets say the connector action you are using is returning the following data
And in the connector each field is given a title. The selection list could look like this:
For an end user which has no knowledge of the hierarchy it is very difficult to determine which field to use. Also because you can not tell which fields are collections and which fields are not.
It would be great if you could select a view where the items are shown in a hierarchical way, for example by using indention or by expanding once you click on a parent item. So the list would look more like: