“Anonymous” usage, user data easily accessible and “external content” in Spaces and Feeds?

I would love to be nudged a little in the right direction. We (the dev team of an agency) love what we can see with FluentCommunity - and think about using the paid version instead of Discourse in customer projects. Before we can decide if we want to invest some time to dive deep into the code and the hooks and so on it would be great to have four things sorted out (a bit at least):

• One requirement that we see again and again in projects is that users have to register with real names and first be activated by a moderator - but can then use the platform anonymously - so that only the user name is permanently visible to other users. How can this be implemented here?
• Do you have your own kind of user object(s) in the database or are you enriching the WordPress user? If your own: How are they connected to the WP user? And are they easliy accessible so that we could have other parts of the website that displays content depending on which Space a user belongs to, for example.
• I see, that there are different kinds of posts für the Spaces and the Feeds. Is it easy to create more of them programmatically? So if we have custom post types in a website - to show it's posts also in the Spaces and Feeds.

Thanks a lot!