why is my live wallpaper not working?

Live wallpapers are not compatible with iPhone XR.

As far as Face ID is concerned, follow ALL the steps provided in this support guide:--> If Face ID isn't working on your iPhone or iPad Pro – Apple Support

If the issue still persists, contact Apple Support using this link:--> Get Support

Regards

Giulio

I don't understand what makes you laugh so much.

You can’t get a wallpaper? Haha 😂