The outgoing Biden administration actually stated that they wouldn’t enforce the ban for just one day, choosing to leave implementation of the law to the incoming Trump administration.

Efforts to save TikTok have been bipartisan (“Senate Democratic Leader Chuck Schumer said he spoke with Biden on Thursday to advocate for extending the deadline to ban TikTok.”) and efforts to enforce the ban have also been bipartisan (“Democrats had tried on Wednesday to pass legislation that would have extended the deadline, but Republican Sen. Tom Cotton of Arkansas blocked it. Cotton, chair of the Senate Intelligence Committee, said that TikTok has had ample time to find a buyer.”)

https://www.pbs.org/newshour/politics/biden-wont-enforce-tik...