Epic chose to set up their own games store on Android and then pulled it a year and a half later and went back to the Play Store.
They also have an Epic games store for Mac and PC.
If they had ever put two and two together they could have had a cross platform Android, Mac, and PC games store with cross-buy and cross-play which would beat Steam and they cound legitimately accuse Apple of locking them out.
But at the moment it seems they seem to want other people to do the work for them.