How to start graphical session on local tty2?

Question

SSH

There are 2 machines with OS Kubuntu 18.04.3 LTS amd64 Desktop. On machine A, using the ctrl + alt + f2 key combination, we get to tty2 , in it you need to start a KDE session on machine B using SSH. In total, there will be 2 KDE sessions on machine A: on tty1 - local, on tty2 - from machine B.
Launching separate graphical applications from machine B to tty1 (where a KDE session is already running by default) machine A works fine, for example I start Dolphin by typing in Konsole:

ssh -XC [email protected]
dolphin

But you need to run a full-fledged remote graphical session on tty2 without using xrdp, vnc, etc.
In fact, you need to somehow make the plasmashell of machine B work in tty2 of machine A