The AI can only hallucinate. It hasn’t been trained to answer about a user interface feature only implemented in the last days. You can ask anything you want in a suggestive manner and get a plausible answer.
The user interface should now be pretty clear, the concerns in this topic being solved.
What is “deprecated” about chat share, (which OpenAI uses erroneously to mean “disabled”, “shutoff”, over and over) is the “continuing” a shared conversation in your own ChatGPT account. A feature far too useful with many applications, so of course it had to be removed and replaced with a ChatGPT Plus ad.