I spent a lot of time trying to get this to work and look good on both desktop and mobile browsers. iFrames are nice but have CSS and other issues on mobile browsers. Tried Embed… not so good. However, I was able to use the Object code and works perfectly with scrolling on desktop and mobile and maintains your app formatting.
Just swap out the page, width and height in the code below. Place it wherever you want the content on your page. Easy peezy.
<object type="text/html" data="https://yourwebsite.com/yourpage.html" width="100%" height="800"></object>