How to intgrate 1Password with Android Apps.

Hi, I have installed 1Password on my iPhone and use it very smoothly.
I have added the Coinone app through the App Store, and 1Password recommended the ID and password successfully.

Also, I have installed 1Password and Coinone app to my Android phone through the Play Store, but the 1 password recommendation
is not showing on the top of the input keyboard. But some other apps properly behave as like as iPhone. Is there any guide to the Coinone app to show ID/Password recommendations on the source code level? Then I will share the guide to Coinone company if needed.

and more questions,
1. id/password registration on the 1Password app according to the guide on your webpage. 
There is a Twitter example. In there, the Twitter logo is showing. But in the Coinone case, it never shows its logo. The Coinone app is here, https://play.google.com/store/apps/details?id=coinone.co.kr.official&hl=en&gl=US , It there any way to set the app icon?
2. Through reading the forum of your webpage, it said the 1Password app matches the app’s package name in the case of Android,
but I can not find the menu to input the package name. Where can I find the menu to input the package name in the 1Password app?

1. Is there any relationship with this setting to show Id/Password prompt for the Android apps? https://developer.android.com/training/sign-in/credential-manager Do Android app must implement this to interact with 1Password app?

1Password Version: 8.10.24
Extension Version: Not Provided
OS Version: android 7/12
Browser: Not Provided