While search results aren't speech, they are how people get to speech. At least in the USA - You aren't guaranteed a platform for your speech, and you aren't

While search results aren't speech, they are how people get to speech. At least in the USA - You aren't guaranteed a platform for your speech, and you aren't guaranteed other people will listen to you. All you are guaranteed is that the government won't persecute you for saying it. So a private company that does not promote your speech, is not a violation of the 1st Amendment.