Laravel 10 | Why ajax [POST] throw an error with route [POST]?

I've seen the post below, but I'm still unsure why the POST method doesn't work. I could probably use GET but .. am I using POST the wrong way? (the same code worked fine in Joomla) I removed the data on the URL (test + data), but Laravel return the same 405 . Many thanks.

Laracast: https://laracasts.com/index.php/index.php/discuss/channels/laravel/the-get-method-is-not-supported-for-this-route-supported-methods-post

POST ERR: http://localhost/jxfileupload?task=file_upload&mp3Len=89&pid=1&app=stt 405 (Method Not Allowed)

AJAX :

var task = "?task=file_upload"; proid= proid?proid:1;
var data = "&mp3Len="+mp3Len+"&pid="+proid+"&app="+app;  
var link = pagedata.app_url+"/jxfileupload/"+task+data;   // localhost/jxfileupload +task+data

var file_data = $('#select_file').prop('files')[0];   
var fdata = new FormData();                  
fdata.append('file', file_data);    

$.ajax({
    xhr: function() {
      var xhr = new window.XMLHttpRequest();

      xhr.upload.addEventListener("progress", function(evt) {
        if (evt.lengthComputable) {
          var percent = evt.loaded / evt.total;
          percent  = parseInt(percent * 100);
          if (percent < 90) { $("#upload_prog").width(percent+"%").html(''); } // allow full upload
          
          if (percent === 100) {
            $("#upload_file").html("Uploaded").prop('disabled', true); 
              
          }

        }
      }, false);

      return xhr;
    },
    url: link,
    type: "POST",
    data: (fdata),
    processData: false,
    contentType: false,     
    cache: false 
    // ...
  
 });   

AjaxController:

class AjaxController extends Controller
{
    public function file_upload()  {     
			// ...
	}

//...
}        

Route

Route::controller(AjaxController::class)->group(function () {
    Route::get('/jxuserfiles', 'get_userFiles');
    Route::post('/jxfileupload', 'file_upload');
});