no, cross data center cluster deployments are not supported yet.
What is missing is data center awareness, so that each region would maintain a complete replica of
the data and that agents would prefer cluster nodes and security gateways
in their own region (or the one geographically closer).
Note that it is perfectly fine to have cluster nodes in multiple availability zones within an AWS region.
Do you mind if I ask what is your primary use case for multi-region deployment?