In every single achievement category on PTS, only the first achievement in a category is visible and no others are. I know myself and a lot of other people have worked really hard on achievements over the years and the idea of an accidental achievement reset due to a PTS copy to live is honestly painful. While obviously testing the new raid and daily area is your top priority, I hope that the achievement window is fully fixed and all achievements that are supposed to be visible are visible before 7.1 is pushed to live.