I need help distributing content at scale across social media, ai built a content generation machine so that is sorted but now I need to a way to post at scale, many accounts many platforms

hello everybody, I've got a few distinct websites I am working on about 20 that need their own social media presence each, I would like a way to automate these 20 different accounts across social media channels such as: TikTok Twitter youtube Facebook Instagram Reddit Pinterest essentially the best framework out there atm for such a social media automation architecture