Hi Christian,
Greetings from Syncfusion support.
We have understood that your requirement is to move the position of the task label dynamically as the Gantt Chart is scrolled horizontally. Please correct us if we are wrong in our understanding of you requirement. However, we would like to inform you that it is not possible to achieve your requirement. We do not have support to move the position of the task label dynamically and it is also not possible to achieve through a work-around.
We suggest using the tooltip to view the task information at any time.
Please contact us if you have any concerns on this.
Regards,
Monisha.