split in fzflua is ctrl-x

lua/plugins/fzf-lua.lua

@@ -2,7 +2,18 @@ return {
   'ibhagwan/fzf-lua',
   dependencies = { 'nvim-tree/nvim-web-devicons' },
   config = function()
-    require('fzf-lua').setup({ 'borderless_full' })
+    local actions = require 'fzf-lua.actions'
+    require('fzf-lua').setup({
+      'borderless_full',
+      actions = {
+        files = {
+          ['ctrl-x'] = actions.file_split,
+        },
+        buffers = {
+          ['ctrl-x'] = actions.buf_split,
+        }
+      }
+    })
   end,
   cmd = 'FzfLua',
   keys = {