Build a multi-platform streaming service

I want to build a streaming platform that can stream live to multiple social media platforms. An example is provided in the attachments. My platform will primarily target creators of short video content, so we will look to integrate with TikTok, Instagram/Facebook reels, and youtube shorts in addition to the features in the sample site. I want to use Nodejs for backend, Graphql, or Rest API for API and frontend with reactjs