How to enable the header insertion of clangd?

Language Server Protocol (LSP)
1

Clangd has a feature that can insert header that I need automatically. It works on vscode, but not work on my neovim.
my lsp config for clangd.

lsp.clangd.setup {
       capabilities = cmp,
       cmd = {
           "clangd",
           "--background-index",
           "-j=12",
           "--query-driver=/usr/bin/**/clang-*,/bin/clang,/bin/clang++,/usr/bin/gcc,/usr/bin/g++",
           "--clang-tidy",
           "--clang-tidy-checks=*",
           "--all-scopes-completion",
           "--cross-file-rename",
           "--completion-style=detailed",
           "--header-insertion-decorators",
           "--header-insertion=iwyu",
           "--pch-storage=memory",
       }
  }