An android phone asks you to link a google account when you use it for the first time. It takes a very dedicated user to refuse that, then to avoid logging in into the gmail, youtube or app store apps which will all also link your phone to your google account when you sign in.
But I do actively avoid this, I use Aurora, F-droid, K9 and NewPipeX, so no link to google.
But then no ChatGPT app. When I start it, I get hit with a logging page to the app store and it's game over.