All of the car's apps can be found in the app library.
You can access the app library by pressing its symbol in the top bar.
The apps in the library that come with your car are shown in alphabetical order by default. When you download a new app, it's added as the last app in the library. You can rearrange the apps so that they are shown in an order of your choice.
Some apps are pre-installed, such as Bluetooth media, Google Maps and Google Gemini. You can search for and download new apps via Google Play, which can be accessed in the app library.