Hello Guillaume, there are already a few customization options when embedding dashboards via iFrames. You can find them under the
Configuration Options section of our article
Embed Dashboards Using Iframes. You can add parameters to the URL to hide the Navigation Panel on the left, for example. Please take a look at the options there, and let me know if any of them would help you with your use-case!
If not, would you kindly tell us a bit more about the kind of customization option you’d be looking for? I’d be happy to submit a feature request on your behalf.