You can do that today with PySheets. On the PySheets landing page, you can find a live example. The data comes directly out of a sheet that uses a service to convert metrics into charts. For example, one of the three charts shown on https://pysheets.app/#Traction is directly embedded as an iframe from https://pysheets.app/embed?U=uXNuCGO2JU1E5aL7zcOh&k=C12. If I rerun the sheet that produces the charts, the PySheets landing page updates automatically with the latest data.