Listing Registered autocmds

:autocmd lists all registered autocmds.

:autocmd <Event> lists all registered autocmds for the given event. e.g.

:autocmd FileType
--- Autocommands ---
filetypeplugin  FileType
    *         call s:LoadFTPlugin()
filetypeindent  FileType
    *         call s:LoadIndent()
syntaxset  FileType
    *         exe "set syntax=" . expand("<amatch>")
packer_load_aucmds  FileType
    python    lua require("packer.load")({'black'}, { ft = "python" }, _G.packer_plugins)