I might be missing something here , but I don’t understand why you are refering to Grafana, while your sitemap seems to be refering to the OH built-in element-type Graph
:
To my knowledge, that has nothing to do with Grafana. For Grafana, you need something like:
Webview label="Climate Livingroom" url="/static/grafana.html?kiosk&dashboard=openhab&theme=dark&from=Climate_Period1&panel=Climate_Panel1" height=12 icon="line"
To refer to a panel and graph defined in Grafana.