Is it good that the US can ban American corps from working with Chinese corps?
Mostly yes. Most people won't bother making workarounds to download those Chinese apps. However, it will anger the CCP China more, and those American corps profiting from Chinese products.
What I mean is whether or not it's good that the US Government has now set the precedent for being able to ban apps.
What would happen if say, they wanted to ban #DBuzz?
It is technically impossible to ban D.Buzz without banning the entire Hive community itself. And if they do ban Hive, people could just use either VPN or Tor to access Hive freely.