I'm using the Teacher iOS app on my iPad and I'd like to use anonymous grading. I've seen a previous version of the Canvas Teacher iOS Guide (updated May 2019) that says in order to mute grades or enable anonymous grading, I should navigate to the assignment, open the submissions page, then open the Settings via a gear icon at the top of the screen. In my assignments, however, this gear icon is replaced with an eye icon that leads me to a "Post Settings" window, where I can mute and post grades, but not enable anonymous grading.

Is anonymous grading through the iOS app a feature that has since been disabled? If not, how do I enable anonymous grading?