The other-people's-apps-opening-your-site-in-their-custom-webview-and-adulterating-it problem doesn't go away if you onboard with Apple, build an app & register

The other-people's-apps-opening-your-site-in-their-custom-webview-and-adulterating-it problem doesn't go away if you onboard with Apple, build an app & register your domain for Universal Links. The custom webview is quite capable of blocking ULs.