It is a pain to have to wade through all categories - I agree.
I can't even find an option to configure what guests can and cannot do generally - or do I miss something?
Are there scripts that can do this?
I'll think about writing something like this in future 🙂
Right now, you can get an API call of a user's latest posts, so theoretically you could write a simple widget that makes a call to that route (for the admin user) and renders the latest posts using the same code as the other widgets. So for a very basic implementation, if you know your 1-3 admins/moderators, you can easily hack it together using existing code 🙂