completion menu doesnt pop up in normal mode

[GZLiew]

here is my config but I cant seem to display the completion menu in normal mode
insert mode works fine

local cmp = require'cmp'

cmp.setup({
  snippet = {
    expand = function(args)
      vim.fn["vsnip#anonymous"](args.body)
    end,
  },
  mapping = {
		['<C-n>'] = function(fallback)
        if cmp.visible() then
          cmp.select_next_item()
        else
          fallback()
        end
      end,
		['<C-p>'] = function(fallback)
        if cmp.visible() then
          cmp.select_prev_item()
        else
          fallback()
        end
      end,
    ['<C-y>'] = cmp.config.disable,
    ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), { 'i', 'c', 's', 'v' }),
    ['<C-f>'] = cmp.mapping.confirm({ select = true }),
    ['<Tab>'] = cmp.mapping.confirm({ select = true }),
    ['<CR>'] = cmp.mapping.confirm({ select = true }),
  },
  sources = cmp.config.sources({
    { name = 'nvim_lsp' },
    { name = 'vsnip' },
  }, {
    { name = 'buffer' },
  })
})

can someone tell me why?

[Shougo]

Why the popup menu is required in normal mode?
nvim-cmp is for insert mode completion plugin.

[GZLiew]

@Shougo alright I have a scenario where I would like to add missing imports by picking where the error is at for each variable
but I would need to keep going in and out of insert mode and normal mode to jump from variable to variable
which is why I thought there would be a way to trigger nvim-cmp from normal mode.

[Shougo]

Hm... nvim-cmp seems not support normal mode.