Google has actively patched Android Auto to block CarStream in newer versions (Android Auto 8.0+ and Android 14+). CarStream 2.0.6 works only on older Android Auto versions (typically 7.9 or below) and Android 11–13.
If you download CarStream v206 and it doesn't show up in your car, you are likely running a patched version of Android Auto. Here is the workaround method that replaces the need for "Root":
Additionally, I cannot provide direct download links to APK files because: