Not able to write for in loop

[Manager_HMWSSBCDC]

var portal = Portal('https://gis.hyderabadwater.gov.in/portal/');

var item_id = '99646c55510049a583bc1fe853c7f5f0';

var fields1 = ['can','closingdate','objectid'];

var fs1 = FeatureSetByPortalItem(portal, item_id, 4, fields1, false);

var can_2023 = Date(2023, 11, 31)

var filtered1 = Filter(fs1, 'closingdate <= @can_2023')

var can_2024 = Date(2024, 0, 1)

var filtered2 =  Filter(fs1, 'closingdate >= @can_2024')

var features = [];

var feat;

for (var f in filtered2) {

  feat = {

    'attributes': {

      'year' : f['closingdate'],

      'can' : f["can"]

    }}

  }

return feat

When I execute this code, in the output it buffering but not giving any output. can anyone suggest a solution for this.