DebugPoint published a tutorial about installing GNOME 40 in Ubuntu 21.04 for testing.
How to Install GNOME 40 in Ubuntu 21.04 [Testing Only]
A good samaritan created a PPA which you can add and install GNOME 40 in Ubuntu 21.04 (Hirsute Hippo). And this is only for testing the packages. Warning: Use this PPA and add it in your system at your own risk. Things shall break. So do it for experiment only. GNOME 40 desktop recently released
