How to manage weird screen resolution ?

Unity Engine
1

Hello,
My game was designed at the beinning for 1920*1080 screen size and released in 2018.
The last 12 months we got feedbacks about screen resolution issue.
By default we have this resolution:

6079749--659709--bonne resol.PNG
6079749--659709--bonne resol.PNG885×504 465 KB

For smartphone like samsung S9 (2960*144)

6079749--659712--smasungS0.PNG
6079749--659712--smasungS0.PNG886×504 472 KB

And for example huawei mate lite (2340*1080)

6079749--659715--huawei.PNG
6079749--659715--huawei.PNG888×501 453 KB

All canvas I use are “Scale with screen size” and “Match width or Height”.

Please, how could I do make my canvas of non 1920*1080 resolution, to fit the screen ?

Thanks in advance.

2

Put the anchors in the corners.

3

I finally find this script : Controlling Aspect Ratio in Unity
Did the job