XC90 T8, fuel consumption

Dear people, I’ve had my new Volvo XC90 T8 Description for a few days – the car is really a dream. But have some concerns about consumption: I drove yesterday from Vienna to Leipzig, about 580km, and according to the on-board computer used 12.9l/100km. That seems like a bit of a lot to me, doesn’t it? Here are the main parameters: Speed on highway: about 135kmh (with Pilot Assist) Driving mode: Hybrid Battery charge: Was first on “Charge”, and when I had charged about 60%, switched to “Hold”. What did I do wrong? It can’t just be due to the charging process while driving, can it?