Hi Rohit,
thanks for reporting about this. It might happen that some users opted for having very strict tracking protection options enabled in their web browsers.
In order to shed more light on this topic, I just created Web browser enhanced tracking protection prevents embedded Grafana panels from loading. You might want to directly link to that page by attaching it to the footer legend by saying something along the lines of
Don’t see any panels? Please consider reviewing your web browser’s tracking protection options after learning more about it.
With kind regdards,
Andreas.