I'm not sure why you would want to do this, but you can run a Linux Wayland Compositor inside Minecraft to get various external windows inside the game.

A developer going by “EVVIE” managed to combine the worlds of Linux and Minecraft, to enable you to pull up all sorts of Linux desktop windows directly inside Minecraft. Sure does look cool, a bit like running a desktop inside a VR headset like the draft code for the full VR mode for KDE Plasma written about here before on GamingOnLinux.

https://www.youtube.com/watch?v=cTkEM7b0IQw