Microsoft has just pushed the Windows 11 Build 25217 compiled version to Insider testers in the Dev channel. , though, it still belongs to the 22H2 branch, as Sun Valley 3 development, known as "23H2", appears to have been cancelled to move to release a major new Windows version every three years. If all goes well, Microsoft may officially launch sometime in 2023.

screenshot (via Pure Info Tech)
First of all, Microsoft mentioned in the change log that developers can obtain the latest Insider preview from the Dev channel and start building and testing third-party widgets through WinAppSDK 1.2 (preview 2).
As part of WinAppSDK 1.2 (preview 2), we are pleased to announce support for third-party widgets.
The Windows team has been working hard to push the widget board first introduced in Windows 11 to more developers. The third-party widget platform included in the
html version 0 will allow developers to create widgets for their packaged Win32 applications and expand local testing on the widget board in Windows 11.
Simplified Chinese - Input method recommendation box (Bing recommendation words are placed in the second order)
Secondly, Windows 11 Insider Preview Build 25217 includes some input-related changes and fixes.
I'm trying to introduce some changes so that users can easily enter fresh, popular and popular vocabulary in simplified Chinese.
related improvements include cloud advice and integrated search suggestions, the former can add the most relevant words of bing (Bing) search to the candidate window of the input method.
At the same time, we updated the backend logic to provide better and fresher suggestions.

Bing Search Suggestions - Candidate Box Extension Interface
As for integrated search suggestions, they provide similar content and other suggestions you see on the Bing search page.
You can insert relevant suggestions as text, or jump to Bing to search.

V-shaped button/bubble prompt box
Interested users can click the V-shaped button on the right. However, in the early stages, this feature may be only available to some Insider testers.
If you have any content that needs feedback, please submit it in the "Feedback Center" under "Input and Language → Text Input".

part Insider testers also have the opportunity to experience a brand new video calling application (Chat).
When opening the chat application from the taskbar, the focus will automatically focus on the user to instantly preview the video status and view the contact list.
This application can make it easier to initiate personal video calls through Microsoft Teams than ever before.
Instant contacts are not in the Microsoft Teams address book. You can now share call links through short messages (SMS) or email (Email) and start conversations in the Chat main program.

Then, Microsoft is launching an update to Microsoft Store, with related improvements including the exciting games in Game Pass.
When looking for games in the store, you can now see more clearly ‘get via Game Pass’ and the current pricing.
On the game's details page, the new version also updated the button design and added a new section so that users can understand what is included in the subscription.
In addition, the Microsoft Store's library experience has been enhanced with simplified options and improved performance.

If you enable the "Taskbar Optimized for Tablets" on your device, you can also get the following experience improvements.
● Fixed an issue where no window is running on the desktop, which may cause the task to crash when it should be expanded.
● Fixed the issue where using left and right edge gestures could cause widgets/notification centers (respectively) to overlap with the taskbar, or seemingly truncated.
● Fixed the problem that the explorer.exe process crashed when switching the application/input overflowing the float control.
Known issues:
● The taskbar sometimes flashes when converting between desktop/plate poses.
● Or it takes longer than expected to transition to a touch-optimized version.
● When viewing ‘Quick Settings’ using the lower right edge gesture, the taskbar sometimes remains in an expanded state and cannot be restored to the collapsed state.
For more details, please move to the Windows Insider Blog to view it.