[djeikyb]

There's a bunch of different UI frameworks, but WPF is pretty popular, and in WPF, my understanding is the normal control you'd use to just slap text on the screen is TextBlock. And a WPF TextBlock doesn't have any way to make the text selectable. And if text isn't selectable, you don't get the normal affordances of the window manager's copy functions.

I've used Avalonia, which is based on WPF. Its TextBlock control works the same way, which means the default way to put text on the screen is inaccessible. But if the programmer is thinking about it, they could use SelectableTextBlock instead, and then the text is available to the user for selecting and copying.