Google Pixel XL - MIssing Sound Settings

[Android Central Question]

After the last security patch (ver 8.1, Jan 5), the sound setting is missing from my quick pull down menu. I have the Do not distrub, but not the volume control icon. In edit mode, it is not available to readd. Thoughts on repairing?

 

[N4Newbie]

The question is, where did it come from *before* the update?

It is not available, and has never been available to the best of my recollection, in the default OS configuration. My suspicion is that you used a third-party tool to put it there, and said tool may not be compatible with the recent OS update or needs to be re-enabled.