

This is great news!
For those unaware, Google is continuously enacting policies that are closing down the open environment of Android, and I fear this will significantly harm projects like GrapheneOS, CalyxOS, and others.
If you can spare a couple dollars, please consider throwing some money at PostmarketOS or any other mobile Linux project you like.

Instances can be created freely, and are free to both associate and disassociate with other instances as they please.
Each instance decides their comfort with content within their instance and outside it. There are left leaning instances, centrist ones, and I’m sure a few right leaning ones. Some are ban-happy, but many will allow you to post all sorts of content, as long as it’s not too outlandish.
If the content you wish to see/post is wildly outside the overton window, you can join an instance that allows this or create your own. But other instances are under no obligation to federate with content they don’t wish to see.