How do i add icons to custom keymap

[Muizzyranking]

I have set some keymaps and which key has auto assigned an icon for those mappings. I want to change those icons.

I have tried setting the icons in the config

  opts = {
       spec = {
      {
          { key, desc = desc, icon = { icon = icon, color = "orange" } },
       },

This actually worked and changed the icon as I wanted but there are some issues. The keymaps are to be made available only when a condition is met (must be in a git repo). But changing the icon in the config like that shows the keys in which key pop up the when I hit the leader key.

also, I have tried setting it directly in my keymaps.lua file but I keep getting some error like wk is not found (I loaded keymaps before lazy). I switched the order and loaded lazy first and it is still another error.
I do not want to see the key when it is not available.