End of December '23 timetable

Hi,

I’m planning a trip from the UK to Italy and I was thinking to do London → Paris → Milan → Bologna but I can’t find any train on the 16th of December for Paris → Milan, the last day in which I can find a train is on the 9th of December.

Does anyone know when they publish the rest of the timetable? It makes quite hard to plan and wait as I may need to go by flight instead if I can’t book a train and flights are getting expensive.

It’s strange that Paris → Milan is the only route that I can’t book but everything else is there.

Thanks