Comment by jaster

Sorry, to clarify: I used the package `emacs-next` from guix to install emacs 28. You still need to install and configure emacs-lsp along with the LSP backend(s) you want to use.

I'm currently using the doom-emacs "emacs distro" (https://github.com/hlissner/doom-emacs), so doom is taking charge of setting up emacs-lsp for me.