Yeah this won’t work as an array reference
checkitems.name
Map() works on arrays or collections and returns an array and get() works on arrays only. Map() cannot take an array as an input.
Use the array you want to map in the first argument but make sure you click the checklist items array into map() as first argument.
But I think you may need iterate the top level checklist array first and then use a filter to pass only bundles that fit your criteria. Then you’ll get each element of the checklist array you can inspect with a filter and then pass into a set variable exactly what you want. Sometimes this is easier than doing a complicated map().