How to force text field to lose focus? I can't exit edit state after ime action etc

The user can click outside the text field to clear focus. If you want to clear focus programatically you can do the following:

// Fetch the focusmanager ambient by using this statement within a @Composable function.
val focusManager = AmbientFocusManager.current

// Use this function to clear focus.
focusManager.clearFocus()