I checked out the link, and I'm not sure what it is. It doesn't profess to be the open source tiktock. But it is entirely possible I'm missing something very obvious.
"Our mission is to build The Internet Computer, thereby reinventing the Internet as a computer that hosts secure software with superpowers. The Internet Computer is a new technology stack that is unhackable, fast, scales to billions of users around the world, and supports a new kind of autonomous software that promises to reverse Big Tech’s monopolization of the internet."