Hi, @ngrave.product.
Unfortunately, as of right now, Google has trouble indexing Anvil apps. This is on our list of things to fix but, for now, I’d recommend hosting your app’s website and landing page with a different hosting provider (like Wordpress, Squarespace, Wix…) and then serve your app domain with Anvil.
An example of this is https://fairshake.com/. Their landing page is hosted outside of anvil, but clicking on Login will take you to an Anvil app.