Panel Sharing - No updates are running - the only API path?

I created a panel and wanted to share it on my site. I will create a <iframe src = "https … and insert a link to my page, but the graph is displayed but its values are not updated, and I have an automatic update on the graphene in Grafano, as shown on the chart on my site by tapping the wheel in the top-right corner.
Is there any way to solve the chart update?
Thank you for your suggestions.

Update: So maybe the only way is via the API. So I found some guides here, but I’m not very wise.
Can someone explain me how to create a chart and then paste it into my site? And to be recovered from database data?