Unity is a cross-platform game engine for creating games in both 2D and 3D. Unity supports building games for many platforms such as iOS, Android, Windows, PlayStation, Oculus Rift, and many more. Unlock your creativity with Unity everywhere, including on my favourite linux distribution Archlinux. Let's install Unity Hub on Archlinux.

Installing Unity on the wayland display protocol is a bad idea, trust me.
First, you must ensure that Archlinux already has a GNOME desktop environment running on top of X11 windowing system, Nvidia official proprietary graphics driver, or AMD Mesa graphics driver. It's a requirement for linux distribution from Unity.
1. Install an AUR helper, yay.
git clone https://aur.archlinux.org/yay-bin
2. Then,
cd yay-bin && makepkg -si
3. After installing yay, install unity hub from AUR with our AUR helper ‘yay -S unityhub’
4. Finally, install Unity Editor from Unity Hub.

Yeah, its how to install Unity Hub on Archlinux. It's quite easy isn't it?