Rewrite submap name for module hyprland/submap

[SomeCoder99]

I'm using vertical bar and I want to add a submap module but the submap name is to long and its to long for my vertical bar, so I wanna display it as an nerd font icon, but i cannot find how to rewrite the submap name, I cannot find it on the wiki.

Am I missing something? or it is doesn't exists?