Peter Braun Just out of my head to help You with this. Feedhenry Sync was tried and it was running on ReactNative
To check extreme cases: We could try to see if keycloak.js will work on react native.
From my understanding it may fail and we will need to provide additional adapter like here:
https://github.com/wtrocki/keycloak/blob/master/adapters/oidc/js/src/main/resources/keycloak.js#L53