Exist a way in the v3 to use a prefix keymap

[oaSakamoto]

Exist a away to avoid repeat the leader h in all off the keys?

local wk = require "which-key"
local harpoon = require "harpoon"
local l = "<leader>"
wk.add(
    {
        {l .. "h", group = "Harpoon"},
        {l .. "hh", function()
                harpoon:list():prev()
            end, desc = "Previous buffer"},
        {l .. "hl", function()
                harpoon:list():next()
            end, desc = "Next buffer"}
    }
)

[noghartt]

Bumping on this, I tried this:

return {
  {
    'folke/which-key.nvim',
    event = "VeryLazy",
    opts = {},
    keys = {
      prefix = "<leader>",
      {
        "<space>", "<cmd>Telescope buffers<CR>", desc = "List buffers",
      },
    },
  },
}

But, didn't work. Any suggestion in how to approach in this case?

Update here:
Based on this other discussion here, it seems that it's not possible to do it anymore.