[feat] Supports multiple webviews on mobile platforms

[x6eull]

Describe the problem

My mobile application needs to navigate to a third-party page (for authorizing or information reference), and I need a way to add a "return button" for user when he wants to abort that process (and return to the application page).
Iframes doesn't work since some third-party sites use X-FRAME-OPTIONS or CSP header to prevent itself from loading in iframes.

With multiwebview, I can create a fixed navbar on top of the screen to gain more control over the navigation.
However, this is not feasible on mobile platforms since multiwebview are available on desktop and crate feature unstable only.

Describe the solution you'd like

I would like to have multiwebview feature available on mobile platforms.

Alternatives considered

Listen to onBackPressed on Android (snippet from #8142 (comment) ), but it's not applicable to iOS targets.

Additional context

No response

[sebhernandezr]

#11359