Hide all but one custom field in the user approval review queue

I can see that the ember divs are now gone - thank you.

However, I still can’t get the CSS to work, and it just hides all of them. I’ve tried several variations on it; perhaps I’m doing something dumb. Also, I wonder what would happen if it does work as I’m aiming for: wouldn’t the 2nd or 3rd person needing approval have all of their fields hidden?

Here is what I’ve tried:

.reviewable-user-details.user-field {
    display: none;
            &:nth-of-type(1){
            display: block;
        }
}