i preferred this

config/plugins/cmp/cmp.nix

@@ -6,9 +6,6 @@
 
     # Options provided to the require('cmp').setup function.
     settings = {
-      # Disable autocompletion by default
-      completion.autocomplete = false;
-
       # The sources to use
       sources = [
         # Language Server Protocol
@@ -32,31 +29,6 @@
 
       # Key mappings for the completion menu.
       mapping = {
-        # Confirm candidate on TAB immediately when there's only one completion entry
-        "<Tab>" = /* lua */ ''
-          cmp.mapping(function(fallback)
-            local line, col = unpack(vim.api.nvim_win_get_cursor(0))
-
-            -- When the selection menu is open select the next item
-            if cmp.visible() then
-              cmp.select_next_item({behavior = cmp.SelectBehavior.Select})
-            -- Ensure we are mid word
-            elseif col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil then
-              -- Open the selection menu
-              cmp.complete()
-              -- Autocomplete when there is only 1 selection available
-              if #cmp.get_entries() == 1 then
-                cmp.confirm({ select = true })
-              end
-              -- Select the firt item
-              cmp.select_next_item({behavior = cmp.SelectBehavior.Select})
-            -- Keep regular functionality of tab
-            else
-              fallback()
-            end
-          end, {'i', 's'})
-        '';
-
         # Confirm selection
         "<CR>" = /* lua */ ''
           cmp.mapping.confirm({ select = true })