How do I implement the Liquid Glass effect in iOS 26?

[kyuranger]

I want to use Avalonia to implement the liquid glass effect of iOS 26 (of course, it is not limited to iOS). This effect is simply a blurred background effect, similar to the Aero effect of Windows Vista.

I remember there were some related discussions on the forum, and some people proposed solutions, but some of them worked and some didn't. The ones that worked seemed to have some problems such as long rendering time and no support for animation effects.

In fact, I want to use it to implement a drop-down menu like the following, but at the same time support opacity animation:

I have seen many implementations of other UI frameworks on the Internet, such as Flutter, WebView, QT, etc. I wonder if Avalonia has corresponding implementations?