How do I export my game to amazon with admob?

I've just created my first game and it works perfectly on Google play store. I've just added it to amazon store but the admob adverts do not show. I exported it via construct 3 as a signed apk. Any help how to export it to work with amazon would be great. Thanks in advance.

Has anyone used the Mobile Master

Monetization addon. That seems the only way can can achieve adverts in my game at the moment as i carnt get seem to get any advice from the community.

I just don't understand the concept of source forge. It says to use a banner ad my admob account or other, why not just use admob directly instead of going via source forge.

Anyone got any ideas. I've tried exporting it to android studio and building it from there but that didn't work either. Any help would be much appreciated.

If I install a debug apk with admob set to test mode on the amazon tablet it works fine.

When I upload a signed apk with test mode disabled to the amazon store the adverts then do not show.

Anyone have any ideas what I'm doing wrong.