WhatsApp can block or delete your WhatsApp messages. And Apple could decide to not let you call numbers that start with even digits. Neither is a violation of

WhatsApp can block or delete your WhatsApp messages. And Apple could decide to not let you call numbers that start with even digits. Neither is a violation of the 1st amendment. You can disagree about whether or not that should be the case, or whether other laws (like antitrust or discrimination) should apply, but the first amendment views the government compelling speech the same way it views the government censoring speech, and the Supreme Court has consistently found that forcing an entity to display a message is compelling speech.