nvm got it Updated the resolveRouteBinding:

public function resolveRouteBinding($slug, $field = null)
    {
        if (str_contains($slug, '/')) {
            // Get the last part of the nested slug.
            $slug = strrchr($slug, '/');

            // Remove the leading slash.
            $slug = ltrim($slug, '/');

            // Remove all forward slashes.
            $slug = str_replace('/', '', $slug);

            // $lastPart now contains the last part of the nested slug without any slashes.
        }

        $page = app(PageRepository::class)->forSlug($slug);

        abort_if(! $page, 404);

        return $page;
    }

->forNestedSlug($slug); is not working when there i a parent\child\grandchild for me. Now it seems to work as in the db the actual page title slug is the one there