Zooming with the pinching motion on iOS into the site to make small text larger is deactivated on many sites. Including this forum.
Safari allows zooming in iOS11 on all the sites I can remember.
Please allow zooming everywhere.
This is an important accessibility feature for me. The text in the Actual Size View is often very small on an iPhone 6s Plus.
I am using the built in iOS Screen Zoom function as a work around now. But it is cumbersome to use three fingers all the time.