Will there be fact-checking at the CNN presidential debate?

Nothing I have read about the debate addresses fact-checking. How will they treat Trump’s endless lies?

There’s no good way to do it.

1. If the moderator does it, Trump will say they’re biased against him
2. If Biden does it, it cuts into his time to discuss his ideas.
3. If CNN does it after the debate, the audience will be smaller and some people will not know that Trump lied.

I keep asking but don’t see answers: