What Api:s and features are ported to different platforms?

I wonder if there is a list of features and api:s that are ported to the different platforms? I am thinking of adding some of them but I don't know which are worth looking up or if they are even ported. I know for exampel that Chartboost was working on both iOS and Android before, but now I am unsure of the status. Could someone please confirm what is working and maybe the status and if all features of a given api is working? For example:

iOS:
Chartboost (Ads, Video ads, Rewarded videos) ?
Game Center
Push notifications
Amazon Api (like inapps)

Android:
Chartboost (Ads, Video ads, Rewarded videos) ?
Google Game Service
Push notifications
Amazon Api (like inapps)

Steam:
Is the Api fully features or is there some parts that are missing like achivements and trading cards?

FGL HTML5 api