VW EV charging cost report

I have a VW ID.4 and my wife has an ID.3 and I’d like to be able to get a charge report of the cost of each cars charging for the previous month.

The cars are integrated into home assistant via the VW connect custom integration (GitHub - robinostlund/homeassistant-volkswagencarnet: Volkswagen Carnet Component for home assistant). I can see the cars charging and how long for.

Is there a way to pull them into the energy dashboard and add a cost per unit? I have 2 unit rates but even just having the night rate for monitoring the cars would be great.

I used to get this from Eevee but they now want £12 per month per vehicle but since I have the cars in home assistant I thought maybe there is a way for HA to give me the same data.

Thanks
-Chris