Adding to the confusion is the fact that adjusting the zoom level slightly above or below the standard 1x, such as to 0.9x or 1.1x, miraculously brings the tap exposure feature back. This inconsistency makes us think that this couldn’t possibly be by design, and most likely an unintended bug.
This bug also extends to exposure adjustment after the photo was taken, meaning that you won’t be able to recover any of the lost details (such as shadows or highlights) post-processing, even when editing the RAW version. Fortunately, a workaround for the issue exists, which involves zooming in slightly, tapping to activate auto exposure, and then zooming back out to 1x.