Graph 2 Tempo/TraceQL queries on the same panel (alt: monitor trace duration)

Hi everyone
I have an issue I would love some help with - I have a service that generate traces (through the use of open telemetry SDK, otel collector, Tempo and Grafana) and I would like to monitor the traces min/max duration.
I chose to do this with the use of the TraceQL metrics feature and the query:
{resource.service.name=“<my_service_name>”} | max_over_time(duration)
does work as intended (returns a time series table with time stamps and values and can be plotted).
My issue is I cant plot this query and the min version on the same panel. I have tried also using the table transformations but it still didn’t work.
I don’t know if its a TraceQL issue or a Grafana issue, either way I would appreciate any help given, thanks in advance.