Sprite Background with Different Screen Sizes

What is the most sensible method for having a my sprite background stretch or crop for different screen sizes? How do you guys usually manage that?

I have followed a lot of tutorials, but they fail to mention little things like this which allow me to get games into production.

Do I do everything on a Canvas and anchor that?
Do I write script to manage this?

Unity seems to have so many features, I thought there would be an inbuilt facility to manage this.

Thanks in advance

 

Have you checked this : https://docs.unity3d.com/Manual/script-CanvasScaler.html ?

 

That was the only solution that I found.... Other than a C# script somebody posted elsewhere

But if this is what everybody is doing, and how it should be done, then why doesn't Unity Canvas by default? or why dont any of the tutorials recommend this? What is everybody doing about this? What is the norm? Any insight from anybody that has made a 2D game for multiple devices?

I dont really want to get started into a project and my main UI design is wrong lol. I want to get it nailed down first before I get into it.

 

Well I believe it is used by default when you're adding a new UI element to your scene the canvas scaler will be there automatically.
I'm working on PC projects only and for me that feature always worked as expected