User not authenticated when testing a globalscope on a model

The title is a bit confusing, I know.

I have a simple polymorphic "following" system for the User::class, where Users follow other Users or some other models.

I wrote tests for the follow unfollow actions and everything runs fine.

I have a problem testing an attribute that is set in a global scope.

The global scope does the following. In order to avoid the N+1 issue when rendering an index page of users, where every user has a follow/unfollow button. In order to check if the current user has followed the users in the list, I used a subselect query with addSelect() and placed that in a GlobalScope on the User model

class User extends Authenticatable
{
	// stuff

	protected static function booted()
	{
		// I need the authenticated  user here
		$user = auth()->user(); // is this stupid? is there a better way?

		static::addGlobalScope('current_user_follower', function(Builder $builder) use ($user) {
            $builder->addSelect([
                'current_user_follower' => Follow::
                    select('user_id')
                    ->whereColumn('followables.followable_id', 'users.id')
                    ->where('followables.followable_type', User::class)
                    ->where('followables.user_id', ($user) ? $user->id : 0) // there will never be a user with ID of 0
                    ->limit(1)
            ]);
        });
	}

	// there's also this method because the scope returns Null if user isnt a current follower or not logged in
	public function getCurrentUserFollowerAttribute($value): bool
    {
        return (is_null($value)) ? false : true;
    }

}

The above actually works when I request an index page of all users, and if a user is already followed the button displays "unfollow". All in a single query thus avoiding the N+1 problem.

I had to write out the idea before I wrote the unit test that is checking the attribute set by that global scope.

Now I set out to cover it in an actual test but when I request a user list the auth()->user() is awlays null, even tho I tried $this->actingAs(), $this->be(), or Auth::guard()->setUser().

/** @test */
public function user_model_have_initial_follow_condition()
{
$currentUser = $this->createUser();
        $followableUsers = User::factory()->count(100)->create();

        $this->actingAs($currentUser->fresh());

        $followableUsers
            ->random(25)
            ->each(fn($followableUser) => (new FollowUserAction)->execute($currentUser, $followableUser));

        $this->assertCount(25, $currentUser->followsUsers); // this is OK

		// this is not passing, also I know it isnt asserting anything and it isnt an actual test
		User::
            where('id', '!=', $currentUser->id)
            ->each(function($user) {
                dump($user->current_user_follower); // every user reports false and I dont get the 25 true where I set the follow relationshpis
            });
}

When I dd() the auth()->user() inside the global scope it returns null, so my best guess is that requesting the User list in the test is done "outside" the normal flow of a an actual request. Is there a way to "encapsulate" if that's the correct terminology, the User query inside the test so that the authenticated user is set in the global scope??