Yes there are companies organizations and governments locking out tiktok - and thus far there's not much evidence that tiktok does anything more than linkedin, facebook, or any number of other social networks, because of the permissiveness and leakiness of the platforms that everyone's mobile devices run on.

Tiktok is not some extra special danger, except to those who have extra fear of a Chinese owned company. India has banned Tiktok, around the same time they've had border skirmishes with China and are running a big nationalist government.