For native chatgpt app, try allowing 'Native code Debugging', enabling 'DCL via memory', and blocking 'Play Integrity' in Settings in App info.
I personally don't trust any other company with my request history. In case chatgpt stopped working today, I would switch to something like Perplexity (Apple seems to be interested in them as well). Grok is too inaccurate and Gemini too invasive for my needs. Another option is local LLM, but I don't think an average user would go as far as getting 3k USD PC just to run AI.