Amazon EventBridge now supports sharing events between event buses in the same account and Region

You can now configure EventBridge to send and receive events between event buses in the same AWS account and Region, to aggregate all your events from different event buses into a single event bus. You can also fan out events from a single event bus to other event buses, making it easier to decouple applications and produce more extensible, maintainable event-driven architectures within your organization.

Source:: Amazon AWS