Yes, Google Android TV software.

I can't remember the exact site that had the instructions that I followed, but Brave Search AI provided the answer below, which fits my memory.

Key point: Install the replacement Launcher first, otherwise Android will run without a launcher, ie. without an interface, which is a bit... non-ideal. This happened to me at least once (because I can be impatient), but if i recall correctly, I could still get to an adb prompt to re-enable the default launcher, reboot the TV, then try again. Also, please look up some alternative references just to make sure; I don't want to be solely responsible for any potential bricking...

  To replace the default launcher on a TCL TV using ADB, you must first install a third-party launcher (such as Projectivy Launcher or FLauncher) and then disable the stock Google TV launcher packages via command line.

  1. Enable Developer Options and ADB
  Navigate to Settings > System > About and click Android TV OS Build or Build Number seven times to unlock Developer Options.
  Then, go to Settings > System > Developer Options and enable USB Debugging (and Network Debugging if using wireless ADB).

  2. Connect via ADB
  Connect your computer to the TV's IP address using the terminal:

  # adb connect <TV_IP_ADDRESS>

  3. Disable Stock Launcher and Setup Wizard
  Run the following commands to disable the default Google TV launcher and the setup wizard (which often reverts changes on reboot):

  # adb shell pm disable-user --user 0 com.google.android.apps.tv.launcherx
  # adb shell pm disable-user --user 0 com.google.android.tungsten.setupwraith

  Note: On some newer TCL models running Android 14, you may need to temporarily disable the package installer (com.android.packageinstaller) to sideload APKs, or manually select the new launcher via the Home button prompt after disabling the stock launcher.

  4. (Optional, to revert the above changes) Restore Stock Launcher:

  # adb shell pm enable com.google.android.apps.tv.launcherx
  # adb shell pm enable com.google.android.tungsten.setupwraith

Other resources:

https://android.gadgethacks.com/how-to/best-google-tv-launch...

https://www.youtube.com/watch?v=WAKno02w7J0