I implemented this as part of my history explorer card as an experimental feature a while ago, but it didn’t make it in the release yet. I’ve uploaded a test version of the card on the github. You’ll have to install the latest build manually to test the feature, the HACS version doesn’t (yet) include it.
Press the export button to export all visible graphs and timelines to a CSV file over the currently requested time frame (up to 1 month).
Results look like this:
