Day one sales are meaningless. Especially for a big name title. The question is, will the game hold water? Is it gonna have some legs? Stores will sell as many day one copies as there are available to sell, that's how this works. It's the same with consoles. They will sell as many PS5 consoles as Sony produced for day one.
As others have said, Europe is the market Sony is likely to do best in. Europe has the wokest countries in the entire world. Let's see it do the same for Japan, US, Australia, or China. Any of those markets are gonna be a infinitely more difficult to penetrate than the EU.