Hi and Happy New Year!
I’ve made an AdMob extension. It is well documented, has a demo project and it targets the latest AdMob API.
Please check it out.
Community page: https://www.defold.com/community/projects/93085/
Github page: https://github.com/Lerg/extension-admob/
It supports banners, interstitials and rewarded videos.
It’s easy to setup and use.
One important note is that it has a built-in impression share - 1% of all impressions will go to my benefit.
That share allows me to support this extension in a timely manner - fix bugs, add requested features and update it when AdMob SDK is updated.
So feel free to try it and ask any questions.