Option to push car battery level

I have a Kia Niro PHEV, a Zaptec charger, and a Tibber energy contract. In other words: a perfect combination for letting Tibber control my car charging with Grid Rewards!

However, the car (charger) is in the buildings parking garage where there’s no mobile network coverage. There is wifi (so I can read my Zaptec charger), but the Kia doesn’t have wifi unfortunately.

Now, I created s sensor that tracks the current battery level of my car, based on the last reported level from the Kia Integration and the charge data from the Zaptec integration.

My question is, is there any way to push this sensor’s data to Tibber, so that Tibber has an up to date readout of my car’s battery level?

The only current alternatives I see is to have my own smart charging plan in HA (which I already have) and miss out on Grid Rewards, or to use the ‘stupid’ mode in the Tibber app, where you provide a default setting for your car’s battery state (eg. 20%).

Any help is appreciated!