Are you still requiring Outbound Messages for your implementation? Be aware of the Acknowledgement being responded and keep track of NotificationId to prevent a message overload.
Did you know Salesforce has limited the status codes which can be returned in a HTTP Response? This article lists the missing ones and elaborates on how to resolve this.
Ever wondered how PubSub and the Lightning Messaging Service work? Or curious how CSS Variables can be really applied? This article showcases a hobby project and shares a demo and repository for a reusable Style Distributor Lightning Web Component.