I’m away from my computer right now, so Im not 100% sure, but I think you can set display profiles. You should be able to set a display profile that will auto load on login and should set your display options that you want. Maybe this can work despite the colord issues?
I’ll verify if kde display profiles are a thing and if they can help your use case tomorrow.
Sorry. I think it was gnome I was thinking about. The display configuration for gnome allows for specifying layout and advanced profiles when it detects certain monitors are plugged in. Things like dpi, font size, etc. I have a computer hooked up to my TV that runs gnome and another that upstairs running kde