Worldmap plugin: Use Legend to show server name


I created a dashboard to check the status of some servers.
The prometheus metric looks like this:
drng_status{geo=“dr5ref2ftn2wn”,instance=“serverName”,job=“server_metrics”,location=“US”} 1

I would like the Legend to use {{instance}} as variable. At the moment the legend only shows
US: 1
but I would like something like:
serverName: 1
Is that even possible with prometheus?

Thanks for any help in advance,