Section 230 makes no distinction between "publishers" and "platforms", at least not where the ability to moderate or editorialize content is concerned. It doesn't require a platform to be politically neutral, or to only moderate content which is strictly illegal, nor does it forbid the exercise of editorial discretion.

Facebook is allowed to do what they're doing and the question of whether that makes them a "publisher" or "platform" isn't relevant.

... I'm just assuming that's where you were going with this. Here's an exhausting HN thread on an Ars Technica article explaining further:

[0]https://news.ycombinator.com/item?id=24803998

[1]https://arstechnica.com/tech-policy/2020/06/section-230-the-...