here is the situation today:

project maintainer(s) get notifications of new proposals and issues only in Amethyst out of the clients tested.

in some clients (coracle, snort,and nostrudel) maintainers and item authors get some reply notifications: the kind 1 type that gitworkshop.dev produce, but not the specialised kind that Amethyst produce.

in still other clients (primal) there are no notifications.