[minimouse]

Roblox's UWP Microsoft Store app, for instance, still uses the old legacy EdgeHTML based webview.

... While I mention Roblox, let me just let it be known that the win32 Roblox app, the one that Roblox pushes, uses an incredibly insecure IE webview. Roblox simply doesn't listen to feedback.

[minimouse]

And actually, Microsoft's own MS Store used the UWP webview which is EdgeHTML for a long time until they recently replaced it with a native frontend.