How to auto-fill for iOS app that is a web wrapper?

TravelSD

As my colleague Rudy mentioned, Password AutoFill will match the apps that you use to your login items in 1Password by taking the domain associated with an app and comparing it against the website URL in your login items. If there is a match then Password AutoFill will offer to fill your login information.

If your login item is not being suggested for a particular app then you can add the app's associated domain to your login item in 1Password. When you tap on the username or password field in an app you'll see the Password AutoFill prompt appear (above your keyboard), tap on the prompt and then search for the appropriate login item. Then, tap on that Login Item and tap Fill & Update Login.

1Password will add the app’s associated domain to the Login Item so that, the next time you try to login to that app, Password AutoFill will suggest the right login.

If you don't see Fill & Update Login when you search for and tap on a Login Item then it means that the developer of that app hasn't added an associated domain and there is nothing for Password AutoFill to use to match the app to a Login item in 1Password. This means that you'll need to search for the correct Login item. You can also contact the developer of an app to have them add a specific URL as an associated domain for their app so that you don't need to manually add another URL to your login items: Supporting Associated Domains | Apple Developer Documentation

-Dave