Use case

When using GoRouter or another navigator 2.0 implementation which is inherently declarative it is difficult to reproduce the showModalBottomSheet behaviour.

I would expect to be able to push a bottomSheet onto the page stack of the router instead of adding it to the [Navigator]
Thats what is causing this issue: #100933

When trying to recreate the modal behaviour in a CustomTransitionPage in GoRouter we have this issue blocking us:
#102289

Proposal

• We should have access to _ModalBottomSheetRoute and or the underlying classes.

• We should consider adding adding documentation to gorouter.dev on how to use BottomSheets with GoRouter to avoid problems like [go_router] ModalBottomSheet is not popped when using GoRouter.pop() #100933

Further reading

There are community solutions like simple_cupertino_modal_route.dart but it would be more consistent to have access to the already existing navigator 1 version, especially for anybody considering to transition to Navigator 2.0

There is an open SO question on this as well: https://stackoverflow.com/questions/70478220/how-do-i-declaratively-push-bottomsheet-with-navigator-2-0