Much discussion of whether "Mastodon" is friendly to POC treats "Mastodon" as though it were the monolithic thing Twitter is. But it's not - that's one of the main points.
Specific instances being moderated in ways that are either overtly racist or clueless IS a problem. And if that's happening in lots of instances, that's a huge problem.
But what is it a problem *with*? A solution requires a clearly defined problem.
I think this post captures the question well: https://mastodon.oeru.org/@ScribblingO[email protected]/109409847234141043