You've had answers from others but basically moderation tools are non-existent. When you report something, there's no way to pick to send to admins or community moderators, so if there's an issue with a community the moderators can just resolve reports before the admins see them.

There is no site-wide moderator role, so if you want someone able to take action when CSAM (etc) is posted on a remote community you have to make them admin and also give them access to approve accounts or change the name of the website, etc.

The only actions available are to temporarily or permanently ban a user. You can't restrict new users from posting 100 posts in the first 10 mins or anything like that.

There is not even a way to report a user. If someone makes an account on one instance and starts spamming on a different one, there is no way to report it to the user's instance admins. The user's instance admins are the only ones that can ban a spammer in a way that federates to other instances, so if you can't report it to them then each of the 1000+ instances needs to each ban them. (in reality, admins will normally message each other or post in a spam matrix channel, but the simple option to report a user should exist)