When OpenAI released ChatGPT to the public in late 2022, the AI service had no privacy features. That is, you could not prevent the data in your prompts from being used to train the large language models that powered ChatGPT.
It took several months and pressure from regulators for OpenAI to implement its first privacy controls in ChatGPT. And back then, it was a pretty terrible implementation. You had to either agree to allow your data to be used in training the chatbot, or disagree and have all history turned off.