By opening below link with two different version of Edge browser, noticed one issue.
https://www.fusioncharts.com/dev/chart-guide/advanced-charts/gantt-chart/adding-scroll-to-chart#enabling-scrolling-for-the-gantt-pane
Edge browser version 20.10340.16384.0, its not working. I tried with Edge browser version 20.10240.17146.0 , its working fine