Hi! As an FYI, if what you’re referring to is Advanced Radio Player - KDE Store , then that’s developed by an individual user - I believe it’s @saurov based on this previous post about the widget, but sorry if I’m tagging incorrectly!
I don’t see any source repository info on that KDE Store page, so I’m not sure if the author of that widget takes issue reports and, if they do, what mechanism they’d prefer.