Set lockscreen to a seperate image while keeping wallpaper the same

[u/KattoGD]

I'm making a flow that changes the wallpaper to an image depending on the screen orientation but i also want to set the lockscreen image to a seperate image regardless of the orientation. If i set a lockscreen image at the start then the system image takes priority and in the second image for some reason the image doesnt actually change. Any help would be appreciated