Interestingly, only the regular Pixel 9 has the Even Dimmer feature in Android 16 DP1.

The first developer preview of Android 16 is already here, and as usual, it has new features and changes that Google didn't highlight in its announcement. We've been digging through the new release to document these changes, and we've already found a couple of things -- mostly features we've already leaked in the past. One such feature we discovered in Android 16 Developer Preview 1 is called Even Dimmer, and it's basically a more integrated version of Android's existing Extra Dim mode.