That is a feature provided by the qwidgets based config dialog (see kate, kmail, etc). It's nice to be able to see which data and when it was exactly sent.
A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/1021
Git commit c6c9981a3e86b50198e9b7ca3946938d514f6449 by Nate Graham, on behalf of Aleix Pol Gonzalez. Committed on 25/08/2021 at 23:53. Pushed by ngraham into branch 'master'. [kcms/kuserfeedback] Show the data that has already been sent Useful for auditing what we are sending. FIXED-IN: 5.23 M +21 -3 kcms/feedback/feedback.cpp M +2 -0 kcms/feedback/feedback.h M +15 -0 kcms/feedback/package/contents/ui/main.qml https://invent.kde.org/plasma/plasma-workspace/commit/c6c9981a3e86b50198e9b7ca3946938d514f6449