So is your keyboard buffer. If someone's already in your computer watching your clipboard they're probably also watching anything you type too
Eventually everyone should be using https://github.com/flatpak/xdg-desktop-portal/blob/master/da... (which is based on https://pipewire.org )
For now, e.g. https://github.com/fzwoch/obs-gnome-screencast uses org.gnome.Shell.Screencast
So is your keyboard buffer. If someone's already in your computer watching your clipboard they're probably also watching anything you type too