Live wallpaper selection on Pie?

I find the new Wallpaper app on Pie doesn't let you pick live wallpapers. Even when I downloaded the APK and installed it, it says 'cannot install'. It's not as though 9 doesn't support them, the first time I installed a live wallpaper, I was able to click 'open' on the package installer and set it, but now since it doesn't provide an app icon I can't go back to it if I change to something else. I'm running the LineageOS 16 based Resurrection Remix custom ROM on a OnePlus 3.