A preview at that level isn't convenient as it's not flexible to fake the factory and viewmodel.

Instead you can go a level lower and have an inner composable that only accepts pure data/functions.

See here for example:

https://gist.github.com/CostaFot/1d3ddf1eb6674a7ab738c4fe8d8995c4#file-mainscreen-kt

`MainContent` is the part that is easily previewed, while `MainScreen` is the top level that sets up the viewmodel/factory etc.