There is the possibility to add an additional attribute to Rows adding a level to the chart. However, in version 2020.10.2 it seems not possible because I can add only one Row
In UiPath Process Mining v 2020.10 and greater , some chart types have a completely new User Interface that makes it easier to create them.
Charts created in previous UiPath Process Mining versions are now available as Legacy charts.
For the chart types that do not have a new-style variant yet, legacy versions can be used, for example Gantt charts, or detail lists or pie charts.
Note: Legacy charts might be deprecated in future versions of UiPath Process Mining. For Bar charts, History charts and Distribution charts, it is strongly advised to use the new chart types to get the associated benefits. Moreover, consider converting current legacy charts to new charts.
For more information, read Adding Charts On a Dashboard .