https://www.bbc.co.uk/news/technology-45107687He’s been banned from other platforms, with a lot of Free Speech pundits wringing their hands on various programmes and getting all upset about censorship.
Freedom of speech means you don’t get normally arrested for expressing your views (however, T&Cs apply - most countries have some limits, but this is the USA with their amendments...). What Freedom of Speech does not guarantee you is a platform or an audience. Unless the state runs a social media type thing, you’re in the hands of privately run companies and they can set their own rules for conduct, etc.. Ultimately it’s their T&Cs which you agreed to that apply.