Every home I’ve lived in with casement windows has opened outwards, and has had screens. They work just fine. I don’t know where you get the idea that screens are more challenging if the window opens outwards.

In fact, it’s probably easier to deal with the screens. If the window opens inwards, the screen is on the opposite side of the glass, so to access the screen you have to fully crank the window open. If the window opens outwards, the screen is on the inside, and it can be removed or adjusted whether the window is fully open or fully closed. The only problem I’ve ever had is that if the crank is in an “up” position it can get in the way if you’re trying to take the screen off, but you just give it half a crank and you’re set.