Thanks for the reply.
I will search again in July.
We were planning to go from Zermatt to Florence, but as there is no direct train service to Milan in August, we were planning to take a substitute bus from Domodossola.
I am worried because I did not expect the train from Brig to Domodossola not to run either.
Moreover, the Frecciarossa from Milan to Florence usually takes two hours to arrive, but for some reason it takes three hours on 14 August.
I am thinking about changing my plans, thinking it might be difficult to get to Florence.
Thank you very much for your help.