Other than schoolhouse rumors, it's all conjecture.
Even Southwest has completely taken the Max 7 out of its medium term planning. It isn't in any existing schedule and even long term plans don't have it delivered until 2027, which I am sure can easily get pushed right.
It's not even a joke anymore, it's just sad. When the nations only large aircraft manufacturer can't get a variant of an existing airliner certified by its own regulatory authority allegedly for an issue that exists in planes still being delivered, the entire system is beyond broken.