I'm trying to answer a question via the android app, but I can't seem to find an answer button or instructions / reasons for why there isn't one.

I see the question and its existing answers, but simply no "Add Answer" button anywhere, and no banner/message explaining why.

I later realized the question is protected, and I can see this in the mobile web or iOS app, but not in the android app.

Please fix it and show a message saying the question is protected in anroid app as well.

Note: whatever was done in Protected Question does not show Add an Answer button has been reverted at some point and is not relevant.