Network Load Balancer now supports Inter-Region VPC Peering
Network Load Balancers now support connections from clients to IP-based targets in peered VPCs across different AWS Regions. Previously, access to Network Load Balancers from an inter-region peered VPC was not possible. With this launch, you can now have clients access Network Load Balancers over an inter-region peered VPC. Network Load Balancers can also load balance to IP-based targets that are deployed in an inter-region peered VPC. This support on Network Load Balancers is available in all AWS Regions. To learn more, visit the Network Load Balancer documentation.
Source:: Amazon AWS