When I finished the route of the collected data, I would create another function by passing the data to it and point to the txt_tec_ins_inc
element. I do not know if this example is useful for you. If you get more select in the creation, I would go through it the DOM selecting all the selections inside that container. I hope it helps you.
$(document).ready(function(){
var datos = ["peter","antonio","juan","Andrés","Javi"];
function rellenaCampos(datos){
$.each(datos,function(i,e){
$("#txt_tec_ins_inc").append('<option value="'+ e +'">'+ e +'</option>');
})
};
function rellenarSelects(){
$("#caja").append('<select class="form-control" id="txt_tec_ins_inc"></select>');
rellenaCampos(datos);
};
rellenarSelects();
});
div{
margin-left:200px;
}
#txt_tec_ins_inc{
width:200px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" rel="stylesheet"/>
<div id="caja"></div>