Blur background effect do not work

Hi, I use blur background effect in UI and it is working fine when I play the engine editor but when I package for the android, the blur effect is not seen on the phone.
Does anyone know what this may be connected with?

If I recall correctly, the background UI blur effect is only available on devices that support ES 3.1 or Vulkan. If you check out the Action RPG sample it shows how to set this up.

ok, thanks for the reply.

why only that particular phone?

Blur can be enabled for android by setting “support backbuffer sampling on opengl” to true in Android settings in your project settings