This would help in terms of feature discoverability. "About this system" settings page could have a "Advanced information" button or something.
Not a bad idea.
Any thoughts on where to stick the button in the UI exactly?
On the same footer where "Copy to Clipboard" lives, maybe. Or right at the bottom of the FormLayout
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kinfocenter/-/merge_requests/78
Fixed by Harald Sitter with https://invent.kde.org/plasma/kinfocenter/-/commit/bb80a771a2b709034bcb3cd1138e15ba0d8a0ca6 in Plasma 5.24!