How to improve loki based Time Series graph

Hi,
I would like to improve my time series graph so that it has a trend like in figure “1” (instead of “HTTP Status 301” I would like to have “SipSessionId”). I would like the point in the graph to correspond to the “SetupTime”.
How can I do it?
In figure “2” the result I have obtained so far.

Fig 1.

Fig 2.

logQL:

sum by (SipSessionId,SetupTime) (count_over_time({origin=“AU “, SipSessionId=~”.+”} [$__range]))

Hi, any advice??