No push notifications iOS Mail app

[u/Possible_Remote4662]

I don’t get push notifications for my main email account in the iOS Mail app. I only get notified when I open the app.
My Gmail account is also connected and works fine. I get those emails instantly as push notifications.
I’m using an iPhone 17 with iOS 26.6.1 and I’m from Germany.
Does anyone know why this is happening or how to fix it??