The IsSwipeNavigationEnabled property enables or disables the ability of the end user to use swiping gesture on touch input enabled devices to navigate in WebView2. It defaults to TRUE.
Set the IsSwipeNavigationEnabled property
Pinch-zoom, referred to as "Page Scale" zoom, is performed as a post-rendering step, it changes the page scale factor property and scales the surface the web page is rendered onto when user performs a pinch zooming action. It does not change the layout but rather changes the viewport and clips the web content, the content outside of the viewport isn't visible onscreen and users can't reach this content using mouse.
Set the IsPinchZoomEnabled property