There are right-wing instances of Mastodon (gab, truth, and others), not to mention many Pleroma ones, as well as Lemmy (exploding heads, and probably others). It’s just that they get quickly defederated by everyone else for various valid reasons (usually hate and abuse, sometimes even child porn), so you don’t get to interact with them much. They just get stuck in their own bubble.
There are right-wing instances of Mastodon (gab, truth, and others), not to mention many Pleroma ones, as well as Lemmy (exploding heads, and probably others). It’s just that they get quickly defederated by everyone else for various valid reasons (usually hate and abuse, sometimes even child porn), so you don’t get to interact with them much. They just get stuck in their own bubble.