Energy Management - Import old history data

[flixlix]

I have a Shelly EM installed since Sep´20 and have all of the data stored in the Shelly Cloud. I can download this data into a .csv file.
I would love to have this data imported into the Energy Dashboard. Since this feature only came out in Aug'21, I don't have any of the data between Sep'20 and Aug'21 showing up on the Energy Dashboard.

So the question is:

• Is it possible to import old Shelly data into the Energy Dashboard?
• Is it possible to manually import data one by one?