Within the mindsphere timeseries charts you can specify which aspect / variable is shown in the chart via the “variable path” attribute. To do it interactive you could use the “AspectVariable Selector” Widget and connect the output “Variable Path” from the Aspect Variable Selector as input to the timeseries chart.
Or, if no interaction is required you can provide the variable path configuration as a static string. See here how for further details:
https://documentation.mindsphere.io/MindSphere/resources/mindsphere-webcomponents/components/time-series-chart.html#display-specific-variables