NativeWebView does not work on Ubuntu Linux

[petergolde]

Describe the bug

The NativeWebView control does not work on Ubuntu Linux. The NativeWebView control requires WPEWebKit, but Ubuntu does not package WPEWebKit and it cannot be installed.

Doing:
sudo apt install libwpewebkit-2.0-1
gives:
Couldn't find any package by glob 'libwpewebkit-2.0-1'

You can install webkitgtk on Ubuntu, but it does not work for NativeWebView, even if you set ExperimentalOffscreen to true.

To Reproduce

Create a NativeWebView control on Ubuntu Linux 24.04 or 26.04. Load content via NavigateToString.

Expected behavior

Content should be displayed on the NativeWebView control.

I can provide a sample project if that would help.

Avalonia version

12.0.4

OS

Linux

Additional context

I expect there to be a way that I can display Web content in a control on the latest version of Ubuntu Linux.

[maxkatz6]

@petergolde GTK should be used as a fallback on Ubuntu. And it's likely installed already on a typical GUI setup.
With GTK improvements in 12.1.0 can you test if it works for you now?