Hi Kushal,
Thank you for contacting Syncfusion support.
Currently, we do not have support for Critical path in Gantt in EJ2 Gantt. We have logged a feature report for this. You can track the status from the following feedback link.
As we have already lined up some major features, we could not implement support for Critical Path immediately. We will implement this and include it in any of our upcoming releases. Please cast your vote on this feature based on the customer demand we will prioritize the features in our upcoming road map.
Regards,
Monisha.