How do I change my wallpaper and Lock Screen to be two different pictures

The way I have it set up rn I have an animated screensaver/lockscreen but the wallpaper can’t be changed without changing the other two.. every post about this hasn’t been updated in a while just wondering if anyone found a fix? For some reason it works for people I know but not my laptop even though it’s the same model (MacBook Air m3 SonomaOS)