I received the Zenfone 10 today, which was a complete surprise, thank you very much.
The Zenfone 9 case fits perfectly on the 10, and since it's almost new, I can save the money for a new case.
The case is: Screenguard Carbon Brushed Case (Asus Zenfone 9)

Too bad, but thanks for the answer anyway.

Unfortunately, the Zenfone 9 case does not fit the newer 10 model.
We currently do not have a protective case for the Asusu Zenfone 10, but this can be purchased from other suppliers or directly from the manufacturer.