From Windows updates for Microsoft Edge | Microsoft Docs:
The timeline in the article lists the Windows Updates needed for different versions of Windows, the changes that will take effect on the system after all the updates are applied and the Stable channel of the next version of Microsoft Edge is installed.
The next version of Microsoft Edge features more frequent and more flexible updating capabilities. Because browser releases aren't bound to the Windows major releases, changes will be made to the operating system to ensure that the next version of Microsoft Edge fits seamlessly into Windows. As a result, feature updates will be released on a 6-week cycle (approximately.) Security and compatibility updates will be shipped as needed.
The timeline in the article lists the Windows Updates needed for different versions of Windows, the changes that will take effect on the system after all the updates are applied and the Stable channel of the next version of Microsoft Edge is installed.