Trying to remote desktop to my desktop.... but the window is tiny

I’m using KRDC (Kubuntu 25.10, KDE 6.5.4 on both PCs). when I connect i can see only Konsole, but the whole shared window is very small, if I run other program, like Kate, it still tiny, even if I maximise it. It behaves regardles I choose RDP or VNC.

Where is the problem ?

Interestingly, when my cursor is outside that Konsole app (but still in black area), mouse cursor has an X shape… is it a problem with X11 then? (but both systems use Wayland only)

What are you wanting to do on the remote system that needs the full desktop session? There may be a sleeker solution to what you want to achieve

What are the other solutions? (I connect to my network thru WireGuard)

I can do most of the things with SSH I guess, however for emergency situation, I wanted a full desktop connection as well (to my desktop PC)