When will it be possible to order PS5 again?

I wanted to ask when the 4th wave will come and when you can pre-order PS5, I really want to get a PS5 but unfortunately the chances are bad I wanted to ask when you can order again and how long it will take

Nobody knows. Good availability is not expected until Q1 2021.

Will it then at least be possible to order?

What do you think "good availability" means?

Then when the dealers are supplied by Sony again