Is your feature request related to a problem? Please describe.
The mod appears in the normal Modmenu list, even if library mods are hidden.
Usually you would only want to see the userfacing mods and it might cause confusion, e.g. "I didn't install this".

Describe the solution you'd like
Modmenu provides a way to specify it in the fabric.mod.json:

"custom": {
  "modmenu": {
    "badges": [ "library" ]
  }
}

It will also display this badge

Fabric projects don't typically add Mod Menu badges since it's a third party mod. FLK actually had it at one point but it was removed since it didn't belong here: #43