Twitter is not the public square. They app stores are not the public square. No one takes that argument seriously because it's not serious. Is it censorship that most existing book publishers are highly unlikely to publish a book of your or my political opinions? Should a publisher, or anyone else, be compelled to promote speech they disagree with? Would you want someone to compel you to write or publish lies?

Marjorie Taylor Greene has VASTLY more ability to get her messages out, and to therefore express herself, than the average American citizen. She can go on Fox News or MSNBC or she can have her office send out press releases. Please stop saying this is censorship. This is NO WAY meets any accepted definition of censorship in the frame you are using.