How do I use Fog exponential effect on mobile? (PC / Bluestacks works fine)

Hi, in my testdevelopment i use volumetric fog to "hide" the spawning of the level:

you can see how the blocks spawning is hidden in in the distance by black fog:

gyazo.com/a77b1d67e984d593b677e22f7e6349f2

however the effect does not work on both my mobile test devices.

I have an redmi note 8t which just does not show the fog at all, and on my tablet its just hard cut off at the edge where the fog starts: gyazo.com/bf07aa143022d1989bc061b58e1efb1c

Does that effect do not work on mobile at all? The tablet is a new mid range device:

Lenovo Tab P11 Plus

If this effect does not work, is there any alternative?

Kind regards

Maybe its related to this? github.com/Scirra/Construct-3-bugs/issues/5510

But my devices are not "Old" :(

Update: It seems like a bug to me, this is how it looks if i make the fog red on my tablet: gyazo.com/92d2e3f5a16f94d5e4812b5a8e32d13a