It does not appear in my menu.

https://drive.google.com/file/d/1rAKTbH80DCiHb4fZfJU8FYQHl04_8gTu/view? USPS=drivesdk

I am referring to the toggle or slide switch that has in the past been in the upper right three dot menu. It no longer appears for any site that I frequent.

It is no longer an option in current Opera version. Any ideas why? It does appear in the menu for Opera GX.