Why I cannot see my husband phone location even we shared location?

Take a look at this and make sure that you set it up correctly.

Find friends and share your location with Find My - Apple Support

You could try disabling location sharing, restart your phones and then turn it on again. What part of the world do you live in?

Are you getting the No Location Found message? Are you sure that he is sharing with you?

How are you sharing your location? What happens when you try to see his location in the Find My app?