Launch scanners have a locked-down interface. You need to break out of the "Launch Shell" to install third-party APKs.
Users report that the DiagZone X431 Launcher now works seamlessly on Samsung Galaxy Tab S9 (Android 14) and Google Pixel 7 Pro . xdiag x431 diagzone android 14 mhh auto page 1 fixed
: For users experiencing "Android Auto" interference (a known bug in Android 14), switching to a wired diagnostic connection can sometimes bypass wireless handshake failures. Launch scanners have a locked-down interface