not working Reflections on Mobile (ES 3.1 Vullcan)

test Ver. 4.21.0 and 4.20

--------- Skylight Reflections on Mobile
The Mobile Render can also use a Skylight Cubemap for Specular Reflections when no Reflection Capture Actors are relevant. To enable this all you need to do is remove any Reflection Capture Actors and make sure that Screen Space Reflections have been disabled. You can see an example of this in the following image comparison.

Skylight Reflections PC

Skylight Reflections Mobile