I would like to implement a "progress bar" in the form of a circle with a certain width to it. It starts full grey and then the fill color goes around (like a clock). In svg I would draw an arc. I have no idea how to do this in this model. I guess I need a way to draw on the canvas somehow...

You can look how the

CircularProgressIndicator

is implemented in compose: https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/[…]terial/ProgressIndicator.kt;l=216?q=circularprogressIndicator

That is actually exactly what I need :)