Mbalam railway construction starts late August 2023, page-177

I wouldn't say a hard NO, but a soft unlikely.

"Recent" announcements (in context: last 2 years) have always been released after the event.
I would not expect an ANS announcement about the ceremonial laying of the first stone etc for some days after.

For example, the 25-Feb-2022 contract signing wasn't announced until 04-Mar-2022, nine days later.
https://aust-sino.com/files/files/986_219._Market_Update_-_Execution_of_Infrastructure_Contracts_-_04Mar2022.pdf

I know lawyers are proof reading documents before release, but sheez, come on.
As always, happy be wrong if the timeline moves forward.