AWS SQS also known as Amazon Simple Queue Service now started supporting IPv6 on VPC endpoints via AWS PrivateLink.
Thus it enables Private, Secure and Cost-Optimized message queuing Services
Benefits
Previously, IPv6 supports on AWS was limited to public endpoints. But now it’s extended to all VPC endpoints across all AWS Regions!
By using SQS using IPv6 + PrivateLink we will be benefited by secure, scalable communication between your microservices which resides inside your VPC.
Dual-stack support (IPv4 + IPv6) supports both IP address versions.
One of the goal is to make the people change from IPv4 to IPv6 because IPv4 is a 32bit address it supports approximately 4.3 billion users. Which is filling faster due to increase use of internet by users but IPv6 is 128 bit address which support roughly 340 undecillion addresses.
So, to faster the transition from IPv4 to IPv6 AWS already came up with a scheme of charging for public IPv4 address but using of public IPv6 address is free in AWS. The cost rate is costs $0.005 per hour, or $43.80 per year which increases the cloud charges of companies.
By extending there support to IPv6 and also not stopping the support for Ipv4, Amazon Web Services (AWS) makes the transition from IPv4 to IPv6 seamless—no need to flip everything at once. For more reference AWS Official webpage