How to set up layer hierarchy in unity?

Question

C++ / C#

The panel consists of two elements:
- a static box on which the sprites are located
- a drop-down menu that appears when you click on the button (Sprites can also be located on it in the future)
The problem is that the drop-down menu is overlapped by sprites from the static box.
Is it possible to assign an image "Sorting Layer" to implement a hierarchy. Although it may be done differently
1.
2.

(drop-down menus are red)