Mirror front camera toggle has no effect

Hi there,

A few months ago I tried to take a selfie of myself wearing a shirt that had text on it - and due to the way the front-facing camera works, the text appeared mirrored. I looked online and found that there is a toggle in the settings app to mirror the front camera. Toggling this, however, had no effect on the front camera. Today I tried to do the same thing, and it still doesn't mirror the image. I've tried to switch the toggle a few times, looking at what the picture looks like in each setting but it appears to have no change on my pictures. I even tried factory resetting my phone to see if that would work, and that didn't solve the issue either. Perhaps there's a conflicting setting somewhere causing my issue? Do I misunderstand what this setting does?

Note: I also tried on a friend's iPhone SE(gen 2) and it didn't work on that device either.