Hi @Nitish_reddy ,
I see two topics here, you need a dual axis, and you want a gantt chart. Both features are not available in quicksight yet. Both are great #feature-request .
Lets talk about possible workarounds.
To receive a gantt chart, you can use stacked bar charts, meaning you fill the empty space between with bars and hide them by giving them the background color. For a more detailed description:
Next step issue is the dual axis. What you can do is overlay two charts in your dashboard. Make sure the scale of your axis is the same.
Best regards,
Nico