How to confirm which countries the car can pass through? I submitted several Western European countries, but the feedback is that it can only pass through Germany. What should I do ?

Rent a car from a different garage

Switching to a different garage or car model, not all car models can pass through some garages.

You can directly ask the car rental company, as long as you have paid the border fee, you should be able to go to Schengen countries.