SUMMARY
Does not compile against wayland-protocols 1.2.0 and git master. Reverting the said commit makes it compile. 5.80.0 builds too.

STEPS TO REPRODUCE
1. mkdir -p build & cd build & cmake ..
2. make


OBSERVED RESULT

src/client/plasmawindowmanagement.cpp:425:1: error: too many initializers for ‘org_kde_plasma_window_listener’
  425 | };
      | ^
src/client/plasmawindowmanagement.cpp: In member function ‘void KWayland::Client::PlasmaWindow::requestEnterActivity(const QString&)’:
src/client/plasmawindowmanagement.cpp:1185:5: error: ‘org_kde_plasma_window_request_enter_activity’ was not declared in this scope; did you mean ‘org_kde_plasma_window_request_resize’?
 1185 |     org_kde_plasma_window_request_enter_activity(d->window, id.toUtf8());
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |     org_kde_plasma_window_request_resize
src/client/plasmawindowmanagement.cpp: In member function ‘void KWayland::Client::PlasmaWindow::requestLeaveActivity(const QString&)’:
src/client/plasmawindowmanagement.cpp:1190:5: error: ‘org_kde_plasma_window_request_leave_activity’ was not declared in this scope; did you mean ‘org_kde_plasma_window_request_resize’?
 1190 |     org_kde_plasma_window_request_leave_activity(d->window, id.toUtf8());
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |     org_kde_plasma_window_request_resize