I see there is already some effort. Maybe it broke somehow. Orca is not able to speak the terminal window.
https://github.com/KDE/konsole/blob/master/src/TerminalDisplayAccessible.cpp

https://mail.gnome.org/archives/orca-list/2019-April/msg00032.html

The initial implementation was written, but lacked testing by actual users. I guess setting the terminal role should be rather simple (just setting the property in the right place). I haven't looked at this in ages, let me know if you want help :)

https://codereview.qt-project.org/#/c/259401 adds the "terminal" role to Qt.

In T10099#182472, @gladhorn wrote:

The initial implementation was written, but lacked testing by actual users. I guess setting the terminal role should be rather simple (just setting the property in the right place). I haven't looked at this in ages, let me know if you want help :)

I can try if i understand all that :).