How to add custom permissions to a Page in Filament/Shield?

I created a custom page in Filament that I use to create a Kanban task board. I want to add a new permissions specific to that page named "archive_task" so that I can select it for each role individually.

This custom page permission cannot be nested under each model in the "Resources" tab so I can't add it in config/filament-shield.php in entities.custom_permissions because then it would be nested under the models in "Resources" tab which have nothing to do with tasks or the kanban board.

I am using use HasShieldPage in the page but this does nothing.

use BezhanSalleh\FilamentShield\Traits\HasPageShield;

class TaskBoard extends Page
{
  use HasPageShield;
}