In v2.x trebuchet is not disabled by /e/OS. Users can download and install it but they should not remove Bliss Launcher using adb or as root as some of the packages in BL are common across all launchers. For now Trebuchet is not in App Lounge. I have asked the team to add it to the App Lounge. If an issue can be raised on gitlab to add Trebuchet to the app lounge, that would be better.