How do I reset display settings only for KDE 6?

I have a thinkpad laptop plugged into a docking station with an external monitor. After the last update, my KDE login screen freezes after entering in my password.

This doesn’t happen when I open the lid of my laptop, start the computer and plug in my external screen cable after logging in.

First, I wanted to delete (reset) my current display settings. I can only find a reference on how to do that for KDE 5. How do I delete all the current display settings only for KDE 6 plasma Wayland?