Another thing: have you considered how your content moderation works? ActivityPub based software makes it work mostly through their distributed nature and established commercial social media has armies of moderators and ML tools. And not having content moderation is not really an option. People will post things that are illigal to even store on the server.
Lambda is still under development, the current version is more all for public feedback and testing if it can make a MVP. I would be seeing into all of that content moderation thing. Just that it will take time... or well a lot to be more precise, mainly because I am the only one working on it. Which is hard... really hard, especially if you use Typescript with Nextjs, or maybe again I just have skill issues.