Add new column dynamically in table mySQL with Laravel

I have a sensor list form in my program. There the user can do CRUD. How do when the user enters new sensor data, the new data automatically creates a new column in the table in my database (automatically alter table)

public function store(Request $request){
   $data = new Mst_sensor();
   $arr = array_merge($arr, ['created_by' => Auth::user()->userid, 'created_at' => date('Y-m-d H:i:s')]);
   $data->create($arr);
   

   $sensor= new Trs_sensor_d;
   $table = $sensor->getTable();
   $columns = \DB::getSchemaBuilder()->getColumnListing($table);
        
   $data_field = [];
   foreach ($columns as $k => $v) {
      $data_field[$k] = $v;
   }
   $removed = array_pop($data_field);
   $fix_data_field = end($data_field);

   $q = "ALTER TABLE `trs_raw_d_gpa` ADD `coba` VARCHAR(25) NULL AFTER '" . $fix_data_field . "'";
}

How can alter table run automatically???

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