There are two aspects to Site recovery across availability zones that make me think it's not yet fully implemented:
When setting up Disaster Recovery on a VM, the "help bubble (i)" text contains this link: https://aka.ms/zone_to_zone_dr which is broken.
When creating a recovery plan, with the source and target set to the same region, I get a message "Recovery Plan creation for same region disaster recovery is temporary blocked." but there does't seem to be anything temporary about this message so far!
Is Site Recovery between available zones available and supported?
Regards
Neil