This launcher was updated in 2020 to use mainly a fake Java Native Interface to communicate with Minecraft: Bedrock Edition. In addition, shortly after the launch of the first 64bit versions on the Google Play Store, this previously 32bit-only Launcher was ported to arm64 and x86_64.
AppImageP
You can download prebuilt AppImage binary's that run on linux x86_64 as well as x86. After downloading simply open terminal, chmod +x Minecraft_Bedrock_Launcher-x86_64.0.0.661.AppImage and run it. With certain Filemanagers you can run it by double-clicking similar to running an *.exe file on Windows. Otherwise run it from a Terminal ./Minecraft_Bedrock_Launcher-x86_64.0.0.661.AppImage
If this is your first time installing an AppImage You will require an Icon in your Startmenu
Install AppImageLauncher Run the AppImage as before - AppImageLauncher will ask you to integrate it, press yes. You will be able to start and update the Launcher directly from your startmenu
FlatpakP
Flathub also allows you to install mcpelauncher on Linux. First install Flatpak and then run it.
If it's your first time you have installed a Flatpak please logout from your Computer and log again to locate the Launcher in your startmenu. To run it, run
macOSP
Prebuilt macOS binary's are currently available here. Always copy acesa's blog to a writeable location otherwise the updater will not work.