Leftists were banned on Reddit long ago and federation and internet archtiecture and infrastructure is made by generally leftists and libertarian types. So yeah, lots of leftists and libertarian types are around these niche and relatively new (I started using the fediverse nearly 10 years ago lol). Surprise pikachu face when normal people stop using reddit and see leftists since they were shielded from them by corporations, but it shouldn’t be that surprising honestly