Hi,In 5.27.0 wayland-protocols becomes an optional dependency for plasma-workspace because it was added after the hard freeze date. But enabling wayland-protocols build dependency can make XEmbed on Wayland work properly.
See also: https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/2503
and https://bugs.kde.org/show_bug.cgi?id=448050Please consider adding wayland-protocols 1.31 to your build environment. Thanks for reading.