KDE Gear 25.12 got just released. This includes my fixes (or workarounds) for Konsole & Kate window activation on Wayland. If you now start Kate or Konsole inside Konsole, the new processes will properly activate their windows to come on top of Konsole. This works both for just starting new instances and for re-using already running ones. For more details, see my older post about the implementation. At the moment that only works for Konsole & Kate.