Some confusion about AppIndexing when I try to get my app into Google index

[youngtze]

It is a very useful function that Google has provided a solution called App Indexing in 2016, which can help developers attract more people to use their Apps.

So, I did a carefully research about it with great excitement. However, when I run the code according to site https://codelabs.developers.google.com/codelabs/app-indexing/#0 step by step, I can not get the same results as you displayed in your site. More specifically，I have the following questions and I look forward to hearing from you.

Firstly, when I run official code (https://github.com/googlecodelabs/app-indexing.git), then using the Google app, search for Pierogi Poutine. Sadly, I can not get a result card with "Installed" about Recipe App. And when I click the searching result, it will go to the web page rather than App. So, what happened?

Secondly, as you related that, there will be a "In App" tab at the bottom of search card of Google App. But I find it that, different versions have different performance. For example, in the version 6.6, the performance matches, and in the version 9.0, I have to go More--->Personal Search to reach it, however, in the version above 10.0, I find I can not find the entry. So, how can I reach it?

Thirdly, when I use the recommend Apps in https://firebase.google.com/docs/app-indexing. For example, when I installed the Etsy App, AppIndexing works well, and I can find a result card marked with "Installed". However, when I am not install the Etsy App, I can not find a result card with install button to navigate me to Goole Play to install this App. I think it is very important that auto navigate the new users to download and install my app, but I can not experience this function. Is there something wrong with my operation?

I have been in trouble for some days, and I am looking forward hearing from you。Thank you very much !