Display helpful message (to rotate orientation twice) when loading a scene in iOS/Safari in Landscape Mode

Description:
When using the fullscreen mode in Safari/iOS, the navigation bar stays active.

I am raising this as an issue here, as the WebVR Polyfill Examples are working on iOS, but aframe does not. So it doesn't seem to be an iOS problem.

I was investigating why it is not working with aframe, but the only difference I found is that the examples are calling requestPresent handing over a canvas object.
vrDisplay.requestPresent([{ source: webglCanvas }]).then(function () { ...

Can this be the reason? I tried to add a canvas and call with the source, but it didn't work...

Also interesting the comment:

  function onVRRequestPresent () {
    // This can only be called in response to a user gesture.

Is this ensured in aframe?

WebVR-Examples:
https://webvr.info/samples/
WebVR-Example-Code:
https://github.com/toji/webvr.info/blob/master/samples/03-vr-presentation.html

• A-Frame Version: 5.0
• Platform / Device: iOS/Safari
• Reproducible Code Snippet or URL: