If you are searching something like Miracast - Wikipedia, then it would be GitHub - albfan/miraclecast: Connect external monitors to your system via Wifi-Display specification also known as Miracast.
pamac build miraclecast-git
While gnome3 has a gui for that: Projects · GNOME / gnome-network-displays · GitLab i found nothing for KDE.
pamac build gnome-network-displays
Ubuntu has it builtin into his Gnome3 DE as “Media share” Option i believe.
(Still never used it ever, i believe in cables at home)