Step one: click on pancake icon for menu.
Step two: Click on view blog. (Do not just click on blog)
Step three: click on blog settings
Step four: Scroll all the way down to visibility. Click on it. Then click opt-out of third party sharing.
AI isn't ok. Opting out of this can't prevent all of your work from being used in AI training but it can help. You deserve to not have your work stolen and so do others. AI is stolen work. Don't support it.