I'm kind of confused about the ban. It was agreed by a lot of people that the ban would just mean the app is no longer on the app stores and the app would deteriorate over time due to not being updated.
But then it was said that the ban also applies to Oracle who maintains the infrastructure so the app would go offline. Trump apparently gave assurances that the law wouldn't be enforced which means what people said originally is now true, the app will still function, you just can't get updates.
The way TikTok is operating is dangerous. If a security flaw is found then they have no way of pushing a security patch out.