Volvo XC90 II T8 PlugIn-Hybrid range

Hello, We bought a Volvo XC 90 T8 Hybrid bj 2021 in the USA and drive it after moving now in Germany. The electric range is about half, which is displayed after full charging, often even below. We do not remember exactly what we were promised on purchase, because we would never have expected such a huge deviation. But it was in about 25-30 miles. When we drove there, we had so few charging stations in range and no own wallbox (we rented) that this extreme deviation had not yet occurred to us. But there were not yet 25 miles reached there. How are your experiences? Do you have any chances with a complaint? Would be grateful for your advice. Greetings!