Unreal Engine 5-Real time Landscape

Hi ,
I tried to make an optimized landscape but not with a nanite method .
I only used nanite for house and some rocks (Static mesh) and lumen for lighting .
built the terrain on world machine and export Hight map data to UE5.
I created one material Only for landscape contains 7 layers with 3d foliage and auto heightmap reading Data without painting the layer .
finally I managed to keep the FPS between 30 to 40 in high scalability and Full HD ,still it needs more optimization WIP.

-Plugin in
Ultra Dynamics sky
Megascans Trees

-Graphics card hardware
1 GPU 3080 RTX