Sorry my English language

I need the following

If you launch the menu -Start -> Shutdown -> Lock

Then you can see the lock screen

Now press CTRL + ALT +F2

let's log in to this terminal under the root user

And let's see the running processes ps -eH | less

We will see the process tree, and who started whom

You can find the following

ksmserver -> kscreenlocker_greet

If you look at how kscreenlocker_greet was launched using ps -aux | grep greet

Then we will see the following

/usr/libexec/kf5/kscreenlocker_greet --immediateLock --ksldfd

Is it possible somewhere (I hope it's not hard code) to replace this command with another command or an application being launched? And if so, where can it be found? Very necessary!