I would not be surprised if governments pushing back against all foreign social media is a major theme of the decade. America is basically saying to the world right now foreign social media companies are a major risk. The global reach of America's social media companies could be coming to an end.
No, they set up a framework where any other such case can be easily included in the ban. The executive order doesn't even name TikTok, except when referring to now-revoked previous things it revoked.
> (d) The Secretary of Commerce shall evaluate on a continuing basis trans-
actions involving connected software applications that may pose an undue
risk of sabotage or subversion of the design, integrity, manufacturing, produc-
tion, distribution, installation, operation, or maintenance of information and
communications technology or services in the United States; pose an undue
risk of catastrophic effects on the security or resiliency of the critical infra-
structure or digital economy of the United States; or otherwise pose an
unacceptable risk to the national security of the United States or the security
and safety of United States persons. Based on the evaluation, the Secretary
of Commerce shall take appropriate action in accordance with Executive
Order 13873 and its implementing regulations.