display Facebook Ads in monogame

Hi
I am trying to use Xamarin Components for Facebook to display rewarded video ads. but I can’t find any sample, is there any sample that I can use to implement it in monogame ,there is no sample in github page of project for rewarded video ads, the biggest problem that I have : There is no extension method WithAdListener for IAdLoadConfigBuilder to add an Ad listener while loading Ad.
Thanks