The ground clutter Is not showing under additional landscape

i have a landscape above my main landscape to create mountains. they both overlap each other and both of the landscapes have the same materials and the same painting layers for ground clutter,

the ground clutter works fine on the surface of the landscapes but the ground clutter of the main landscape that’s covered by the mountain landscape is not appearing,

i planned to have an aberration area below the mountain landscape and under the main landscape,

I’ve tried having separate clutter layers and painting layers for each of the landscapes
and I’ve tried having separate materials for the mountain landscape
but nothing I’ve tried and tested failed

so I’m curious to see if anyone else is having the same problem or knows how to fix this

thank you