In control section of material design doc, https://material.io/components/sheets-bottom#theming states "Using a close affordance within the bottom sheet’s top app bar, if available." I could not find built in solution within ModalBottomSheetLayout. Here is what I tried to show TopAppBar in ModalBottomSheetLayout https://github.com/mialkan/ModalBottomSheetLayout/blob/main/app/src/main/java/com/mialkan/modalbottomsheetlayout/MainActivity.kt#L38