I apologize for the delay.
Good news first:<li>text review and text selection for GTK labels is now working on both atspi and accesskit respectivelly. Huge thanks!</li><li>Restarting orca while GTK4 app such as nautilus, gnome-calculator or fractal is in the foreground is now safe. I see no more exceptions when releasing keygrabs on exit.</li><li>This is true from the moment I have started testing this yesterday I have just forgotten to mention it. When key echo is enabled in orca with newton it correctly handles accented non ascii characters while typing. I have tested web content in firefox and chromium, gnome-terminal, libreoffice, gedit, nautilus and fractal.</li>
And now the rest:<li>After todays orca update flat review now just displays window title for me for example name of the folder that is opened in nautilus. I think I have updated everything correctly but I can double check it later today.</li><li>Reporting expanded / collapsed state is really an accesskit integration issue I am afraid as switching to atspi on the same GTK4 version I am getting these reported fine.</li><li>Before starting this yesterday I was using GTK4 4.14.4 as packaged in archlinux. That version has some positive and some negative changes as well than the version you have started with while integrating accesskit. For example the thing with conversation history in fractal I have mentioned in my previous report is broken with GTK4 4.14.4 as packaged in arch linux but it's working fine with both atspi and accesskit when using your branch. Thus I think it's not related to your work. At the other hand in fractal there is a message composer which has some buttons that inwoke a popup menu such as more options. When that menu is dismissed fractal freezes with atspi and accesskit when using GTK4 built from your branch and with the arch linux packaged GTK4 version it's working fine.</li>