After updating to android 9, the Portrait lock/Auto Rotate option is missing from my phone. I cant find it in settings or anywhere, I even tried a full settings reset but still unable to find it. I am attaching a screenshot of my notification pull down drawer. the option is no where to be seen. Please help been struggling with this for long.
I am posting 2 images for reference
If you don't see it in "button order" (scroll down to notification, scroll down the notification to show all quick links, click three dots for button order. Scroll horizontally of the top row, see if its in there) of ur notification screen to add it, then it's due to ur firmware. Update the firmware or wait for an update. Mine was due to a specific firmware that made it disappear.
Look in your drag down quick menu. If you accidentally turn off auto-rotate the icon now names itself "Portrait". Just tap "Portrait" and turn it back on. Hope that helps out.