[BUG] UseModernWindowStyle Missing build in System Tooltips

[GID0317]

Describe the bug

When we hover on close and minimize in winui3 there should be a build in system tooltips shown while in the current iUWM is not shown.

For the Maximize option it intendedly doesn't have a tooltip in Windows 11. For older version of windows, I think it should have a tooltips

Current:

WinUI3:

Reproduction

Hover in the window chrome button > Minimize and Close > Tooltips not shown

Suggested Solution

No response

Library Version

0.10.1

Operating System

Windows 11

Framework

.NET Core and .NET

Framework Version

6

Source of Package

Microsoft Store (Gallery)

Additional Notes

No response

Validations

• [x] Check that there isn't already an issue that reports the same or similar problem.
• [x] Check that this is a bug in the library that should be fixed, not a feature, also this is not about the documentation. (Or please choose the right repo and template.)
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• [x] You've checked that this problem still exists in the latest version. (Keep in mind that we don't provide any support for old versions.)
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• [x] You're sure there's something wrong with the library itself, not how you're using it. (If you are having issues using it and need help, please go to discussion.)

[NotYoojun]

I tried a few WinUI 3 apps on Windows 11 and didn’t see tooltips on the caption buttons either (Minimize/Close). It seems like WinUI itself might not provide those built‑in tooltips anymore, at least not in the same way older Windows versions did.

Could you confirm if this is the expected behavior in the latest WinUI 3, and that iNKORE.UI.WPF.Modern is just matching the platform here? That would help clarify whether this should be treated as a bug or simply a difference in platform behavior.

[GID0317]

Hi, I can confirm that in the latest WinAppSDK 1.8 with Windows 11 25H2 build 26220.6760, the tooltips are still shown. I tested this on my own WinUI 3 application, as well as on other applications such as WinToys, WinUI 3 Gallery, and even the Photos application, and the tooltips are still displayed. I think there might be a bug here on the iUWM side