Rejected photos not greyed out in Android App

As is the case in LR Classic, LR desktop app, and LR web app, the photos which I've flagged as rejected "x" are not greyed out in the thumbnail view of the android app. Indeed, the same is true for for picked photos, or star ratings. 

I can filter them of course, but that's not what I want.

I am I missing a setting or is it not possible in the app? If not, how can I request the feature?