Modify my filter to show the data in the view

I have a problem with a filter that I created thanks to the stackoverflow community but it does not finish working correctly, of course my fault.

This problem I am going to divide into 2 parts, because first, I need to bring the correct data to the datepicker and second I need to filter well the data that the controller method receives in order to save the data. Having said that, I will try to explain it as best as possible.

I have this datepicker, in which you can see that filter by a parameter that in this case is accepted:

<script>
  // here receive the json array from PHP to JS
  var daysData = <?= json_encode($data) ?>;
  var newA = [];
for( j of daysData){
  let start = moment(j["start"]);
  let end   = moment(j["end"]);

  for (let m = moment(start); m.diff(end, 'days') <= 0; m.add(1, 'days')) {
    newA[m.format('DD/MM/YYYY')] = j;
  }
}

$('input[name="datefilter"]').daterangepicker({

    isInvalidDate: function(date) {
      var valid = false ; // default css class
      let d =  date.format("DD/MM/YYYY");
      if(typeof newA[d] !== 'undefined'){
         if(newA[d].acept == 1){
            valid =  true;
        }
      }
      return valid;
    },
   isCustomDate: function(date) {

      var daySettings = 'day_green';
      let d =  date.format("DD/MM/YYYY");
      if(typeof newA[d] !== 'undefined'){
       daySettings = 'day_red';
       if(newA[d].acept == 0){
        daySettings = 'day_orange';
       }
      }
      return daySettings;
    },

});
</script>

But I have another variable in the json that comes from the controller that is area_id, which marks the area of the users that request the vacations. With which what I would like is that apart from painting the colors that I already have encoded, just show me the data corresponding to the area, the user trying to request vacations, example: computer department, with 2 people, only those two people could see the vacations of the two of them.

Edit: part of the driver solved thanks to Javier in the comments.

        //Filtro de inserción en bd.
        //if($vacation != $guardadas){
            if($vacation->date_from != $guardadas[0]->date_from and $vacation->date_to != $guardadas[0]->date_to || $vacation->area_id != $guardadas[0]->area_id){

           $vacation->save();

            $data = request()->all();

           return back()->with('success','Vacaciones Solicitadas correctamente');

        }else{
            return back()->with('error','Fechas no disponibles');
        }

        return back(); 

First of all, thank you very much for your help and attention.

Greetings.