I activated a Realms subscription to transfer my world from Minecraft Mobile on Android to Minecraft Bedrock Edition on PS4. When I log into my Microsoft account on PS4 with the Realms subscription active I get error code CE-34878-0. I wouldnt have this problem unless DUALSHOCK 4 controllers where supported on all mobile versions of Minecraft (Android, iOS, Fire OS).
This seems like a realms issue, which would need to be reported on the REALMS Jira project
Dualshock 4 is supported on android: https://www.androidcentral.com/how-use-playstation-4-controller-android