Gnome and KDE are not doing the same thing.
KDE will continue to offer an X11 session for the time being:
Current status: Plasma’s X11 session continues to be maintained.
https://pointieststick.com/2025/06/21/about-plasmas-x11-session/
Gnome will disable the X11 session in the next release and then remove the code:
The most likely scenario is that all the X11 session code stays disabled by default for 49 with a planned removal for GNOME 50.
https://blogs.gnome.org/alatiera/2025/06/08/the-x11-session-removal/
Gnome and KDE are not doing the same thing.
KDE will continue to offer an X11 session for the time being:
https://pointieststick.com/2025/06/21/about-plasmas-x11-session/
Gnome will disable the X11 session in the next release and then remove the code:
https://blogs.gnome.org/alatiera/2025/06/08/the-x11-session-removal/