The feature request is to enable ingestion of the resource type AWS::ElastiCache::ReplicationGroup into Port via AWS exporter. According to AWS Cloud Control API documentation, this resource type is not currently supported, which prevents its ingestion through the Port AWS Exporter directly.
There is a similar feature request to ingest other types of easticache resources: https://roadmap.port.io/ideas/p/support-aws-elasticache-not-severless-type