"Chinese social media apps, including Lemon8 and RedNote, could also end up being banned under this law," Tobin Marcus, head of U.S. policy and politics at New York-based research firm Wolfe Research, told CNBC.
If the TikTok ban is upheld, it will be unlikely that the law will allow potential replacements to originate from China without some form of divestiture, experts told CNBC.
PAFACA automatically applies to Lemon8 as it's a subsidiary of ByteDance, while RedNote could fall under the law if its monthly average user base in the U.S. continues to grow, said Marcus.