[Solved]-Highcharts export button not showing (included the libraries etc)-Highcharts

You have defined options for exporting twice:

    chart = Highcharts.chart({
      exporting: {
        "enabled": true
      },
      ...,
      exporting: {
        enabled: false
      },
      ...
    });

Which results in disabled exporting. You just need to enable it.

Live demo: https://jsfiddle.net/BlackLabel/na5rc2s9/

API Reference: https://api.highcharts.com/highcharts/exporting.enabled