I have problems with the Camera.ortographic to adapt the view to screens with different resolutions.

Camera.orthographic works in a really strange way so to be clear I am attaching a photo.

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 public class Screenprop : MonoBehaviour
 {
     public static float realW;
     public static float differenceW;
 
     public void Awake()
     {
         realW = (2560f / RecogniseProportions()) * 9;
         differenceW = (1440 - realW) / 2;
     }
 
     public float RecogniseProportions()
     {
         return Screen.height / (Screen.width / 9);
     }
 }
 

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RecogniseProportions() in this case recognizes that the screen is 19.5 : 9, In realW there is 1181.54 which as in the photo is the width part of the view shown on the screen. While in differenceW there is the initial part of the view that is not shown on the screen.

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So to position the objects you can rely on these 2 measures. For example if we want an object in position (0, 0) the coordinates will be (DifferenceW, 0), if we want it on the far right, the coordinates will be (RealW + DifferenceW, 0).

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I hope I have been clear to others who may encounter this problem.