As part of Project Texas[1], they've already been using Oracle's infrastructure.
> The central feature of Project Texas is our work with Oracle to isolate the TikTok services serving U.S. users within Oracle’s U.S. cloud environment as an additional safeguard. Although gateways to the storage infrastructure are strictly monitored and controlled, U.S. users of the TikTok platform can still communicate and interact with global users for a cohesive global experience.
> The central feature of Project Texas is our work with Oracle to isolate the TikTok services serving U.S. users within Oracle’s U.S. cloud environment as an additional safeguard. Although gateways to the storage infrastructure are strictly monitored and controlled, U.S. users of the TikTok platform can still communicate and interact with global users for a cohesive global experience.
[1]https://usds.tiktok.com/usds-about