With President-elect Donald Trump adding uncertainty around whether a TikTok ban will leave into result, the focus is now turning to companies like Google and Apple that are expected to receive the popular video sharing app off their platforms in just two days.

Though the Supreme Court on Friday unanimously upheld a federal law that could ban TikTok nationwide, it’s ambiguous how a shutdown of the popular social media platform will play out and what Americans will view when the clock strikes midnight on Sunday.

The court selection comes against a backdrop of unusual political agitation by Trump, who vowed that he could discuss a answer after he takes office, and the administration of President Joe Biden, which has signaled it won’t enforce the law beginning Sunday, his final packed day in office. Now, tech observers — and some users — are intently watching to view what happens over the weekend and beyond.

“We’re really in uncharted territory here in terms of tech policy,” said Sarak Kreps, the director of Cornell University’s Tech Policy Institute.

Under the law, mobile app stores — like the ones operated by Apple and Google — and internet hosting services will face major fines if they continue to distribute the platform to U.S. users beyond the deadline for divestment from ByteDance, TikTok’s China-based parent corporation. The companies could pay up to $5,000 for each user who continues to access TikTok, meaning penalties could total to a large sum.

A lawyer representing TikTok told Supreme Court justices last week that the platform will “leave dim” on Jan. 19 if the law isn’t struck down. But TikTok, which is not required to block its own platform under the statute, has not said whether it will limit access to the app, or its website, on Sunday. Experts have noted TikTok’s app should remain available for current users, but existing ones will no longer be able to update it, making it unusable in the long term.

Trump’s national safety adviser has signaled this week that the incoming administration may receive steps to “keep TikTok from going dim,” though what that looks like — and if any of those steps can withhold legal scrutiny — remains ambiguous.

“My selection on TikTok will be made in the not-too-distant upcoming, but I must have period to review the circumstance,” Trump said Friday in a post on Truth Social after the court’s ruling. Earlier in the day, he said in another post that TikTok was among the topics in his exchange with Chinese chief Xi Jinping.

In the meantime, some of the attention has turned to tech companies, such as Apple, Google and Oracle, who currently propose TikTok on their app stores or host corporation data on their servers.

Tech CEOs have been attempting to forge friendlier ties with Trump, who wants to put the TikTok ban on hold, since he was elected in November. But Kreps said it would “defy credulity” for them to continue to propose TikTok, even if they desire to please Trump, since it would open them up to punitive fines.

Tech companies are also used to removing apps at the behest of governments. In 2023, Apple says it removed nearly 1,500 apps globally. Nearly 1,300 of the apps were taken down in China.

“Penalties for companies like Apple and Google could run as high as $850 billion,” Sen. Tom Cotton, R-Ark., wrote on X on Thursday, while referring to the U.S. TikTok law. “Not sure I’d receive a politician’s word if I ran those companies.”

Meanwhile, David Choffnes, executive director of the Cybersecurity and Privacy Institute at Northeastern University in Boston, said he believes there’s a “tiny chance” that nothing happens to TikTok, but acknowledged that would require “enormous uncertainty on the on the part of the companies that back them.”

Apple, Google and Oracle did not respond to questions sent this week about their plans on TikTok.

In a video after the court ruling, TikTok CEO Shou Chew, who is expected to attend Trump’s inauguration and be granted a prime seating location on the dais, thanked the president-elect for “his commitment to work” with TikTok to “discover a answer” that keeps the platform available.

“We are grateful and pleased to have the back of a president who truly understands our platform — one who has used TikTok to express his own thoughts and perspectives, connecting with the globe and generating more than 60 billion views of his content in the procedure,” Chew said.

Earlier this week, TikTok told its U.S. employees that its offices would remain open for work even if the “circumstance” won’t be resolved by Sunday. In the memo, which was first reported by The recent York Times and confirmed by the corporation, TikTok told workers that their “employment, pay and benefits” were secure, adding that the law was written in a way that impacts the U.S. user encounter, not the entities that employ them.

Meanwhile, in a note sent Friday to Biden and Attorney General Merrick Garland, an attorney for TikTok creators who sued the government asked the administration to pause enforcement of the law “until there is further definitive guidance.”

“In addition, we request that you explain that no app store, internet hosting service, or other provider faces any uncertainty of enforcement or penalties with regard to TikTok, CapCut, or any other ByteDance apps, until such further guidance has been issued,” said the note by attorney Jeffrey Fisher.