I have a very low-throughput service. I’m trying to make dashboards for it using Trace data as my source. Because data is so sparse, most timestamps have no data. As a result, the ending X-axis value for different graphs is different. In the attached image, notice that the last X tick is 9:00 for the top panel, and 11:00 for the bottom one. Is there a way to fill in a value for time ticks with no data, like zero?

a way specify that the two graphs should use the same range for the horizontal axis....no idea but I would definitely see that a useful feature

Is there a way to fill in a value for time ticks with no data, like zero?

Not at the moment. Can you create an issue here https://github.com/SigNoz/signoz?