Here is a version of gnomenu that works on gnome 3.36 and 3.38.
Gnomenu is a menu similar to the start windows menu, used to start the applications on the system. It is a shell extension of gnome.
Here is a screenshot on ubuntu 20.20

On the official page of the extension you can find all the details.
To install the new version, you must first remove the gnomenu extension if it is already present. This can also be done from the terminal by typing
gnome-extensions uninstall gnomenu@panacier.gmail.com
Then you need to install the version I propose by downloading the
and install it with
gnome-extensions install gnomenu@panacier.gmail.com.zip
Now you can reload the gnome shell by typing Alt + F2 and “r” + Enter in the screen text box.
If everything went well you will get the new menu on gnome!
Of course it is not perfect, in some installations I have noticed that the folder icons on the left do not appear … let’s say that the menu core works
Let me know what you think!