Why find my Friends does not get Always option in Location Services anymore?

Recently I noticed that the location accuracy of Find My Friends has become VERY POOR. My wife or kid locations could often be off by a few km! I did some research and some people said check whether the Location Services has been set to Always. Then I noticed that the Always option is not available at all. I suspect that is the reason why the location accuracy was so poor. Any idea?? Apple please fix this!

we are all on latest iOS 13.6