Troubleshooting a switch interface variable

the environment: Granfana version 8.4.2, the data source zabbix
I want to get switch all interfaces traffic through using a variable , but it can’t get data when i define a interface variable, variable host and variable group is ok, can you help me? i upload the picture

Have you tried adjusting your query? It doesn’t look like that query is returning anything? Do you see anything in the network tab of your dev tools?

i only found the query type in dashboard setting, maybe other version ,it seems have the query. can you have good advice?