Gmail add-ons not available in mobile website?

Question

This page states:

The contextual cards you create for your add-ons work for both web and mobile versions of Gmail. This means that you don't need to create separate web and mobile versions of the add-on — the same code works everywhere!

Note: Gmail add-ons have not yet been added to the iOS version of the Gmail app.

However, if I browse https://mail.google.com from Chrome for Android browser (on mobile phone), I don't see the cards in the mobile website of Gmail, and add-on actions don't seem to work.

Is there a trick to enable it?

Answer 1

By " mobile version of Gmail " Google means " Gmail Application ", as noted in official announcement:

[..] because add-ons work the same across web and Android , you only need to install them once [..]

Source: https://blog.google/products/g-suite/do-more-your-inbox-gmail-add-ons/

There is no evidence of Gmail add-ons support by mobile web version of Gmail as of May, 2018.

Answer 2

Add-on will get triggered once you open a mail. Scroll down to the end to see the available add-ons in the gmail application.

Note Chrome extenstion is not an add-on. It extends the features of google-chrome browser. But a gmail add-on extends the features of gmail itself.