Is there a way to make a blur

Surface

(foreground) or

Image

(itself)?

Not directly. You can use Renderscript to blur a Bitmap

Well, I have implemented the blur Image, but how can I create the blur Surface? I want to blur the composables beneath the Surface.

Ah you can't do this without taking a screenshot or first drawing your composable to a Bitmap that then you blur

How to draw composable to Bitmap? 🤔

I think you can put the Composable in a ViewGroup/View that you draw on a canvas from a bitmap.