Windows 10: What does the phrase "pre-release version of Windows that has reached end of service" mean...

I keep seeing this in "My Feedback" when I submit feedback on the Your Phone app... what does the phrase "pre-release version of Windows that has reached end of service" mean exactly? I have installed all the latest Windows 10 updates, how can I install the latest version of Your Phone?For reference:Edition Windows 10 ProVersion 21H1OS build 19043.1110Experience Windows Feature Experience Pack 120.2212.3530.0Your Phone 1.21052.124.0

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Windows 10 version 1809 will reach end of servicing on Nov. 10, 2020

Source:

• https://support.microsoft.com/en-hk/...d-of-servicing
• https://docs.microsoft.com/en-us/win...ge-center#1518

 

Windows 10 version 1909 will reach end of service on May 11, 2021

Windows 10, version 1803 and other editions of Windows 10 have reached end of servicing

The following versions and editions of Windows 10 have reached end of servicing.

• Windows 10, version 1909: Home, Pro, Pro for Workstations and Pro for Education; and Windows Server, version 1909, all editions
• Windows 10, version 1809: all editions except Windows 10 Enterprise LTSC 2019 and Windows 10 IoT Core/Enterprise 2019 LTSC
• Windows 10, version 1803 and Windows Server, version 1803: all editions

Windows Update will automatically initiate a feature update for Windows 10 consumer devices and non-managed business devices that are at, or within several months of reaching end of servicing. For these devices, you can choose a convenient time for your device to reboot and complete the update. This keeps your device supported and receiving the monthly updates that are critical to security and ecosystem health. For more information on end of servicing dates for currently supported versions of Windows 10, see the Windows 10 Home and Pro Lifecycle page, Windows 10 Enterprise and Education Lifecycle page, and Microsoft Lifecycle Policy search tool.


Source: https://docs.microsoft.com/en-us/win...ge-center#1601

 

Windows 10 version 1909 will reach end of service on May 11, 2021

Current status as of April 9, 2021

On May 11, 2021, the Home and Pro editions of Windows 10, version 1909 and all editions of Windows Server, version 1909 will reach end of service. After that date, devices running these editions will no longer receive monthly security and quality updates containing protections from the latest security threats. We recommend that you update these devices to the latest version of Windows 10 immediately. Education and Enterprise editions of Windows 10, version 1909 will reach end of service May 11, 2022. For information about servicing timelines and lifecycle, see the Windows lifecycle fact sheet and Lifecycle FAQ - Windows.


Read more:

• https://docs.microsoft.com/en-us/win...indows-10-1909
• https://docs.microsoft.com/en-us/lif...0-home-and-pro