You can use this flake to add cosmic to your configuration
Oh I love your wallpaper, do you have a link to somewhere I can download it?
Thats interesting, I am using lineage as well (oneplus 6t) and do have the app com.android.devicelockcontroller
. This could be some junk added when I enable the gapps magisk module which I generaly keep dissabled though.
I thought of the VR shooter Pavlov shack first.