How to mimic List at levels function with List.Map node

Dear professionals,
Could you please help me with List.Map Node usage. I can not understand how to use it for complex nodes
like List.SortByKey, List.GroupByKey or List.GetItemAtIndex when you need them to operate at different levels of each data input.
For instance, could you please advise me how the same results on the snapshots can be achieved with List.Map node and, if you can, explain a bit dynamo logic:
Pic 1:

Pic 2:


See the attached link to Dynamo Primer.

Much of the List.Map functionality has been resolved with the addition of the List@Level feature.

I think you’re basically using the functionality already, and adding the nodes would make your graphs more complex than solving it the way you are doing.

You can also have a look at this Youtube video: