It seems obviously against AWS incentives to offer working v6 - all their influencing tools ("well architected" criteria, certificates) strongly herd you towards building mazes of ambigously addressed 10.x RFC1918 networks, and not internet style architectures with end-to-end addressing.
In the world of their recommendations, even the concept of a "public ip address" is a red flag, and AWS even recommends (for an added cost of course) tooling to flag and "mitigate" them. These provide a strong lock-in effect when customers spend effort to build the complex infrastructure for them in the name of security, even though in reality they hurt security through unnecessary complexity, addressing ambiguity, etc.
In the world of their recommendations, even the concept of a "public ip address" is a red flag, and AWS even recommends (for an added cost of course) tooling to flag and "mitigate" them. These provide a strong lock-in effect when customers spend effort to build the complex infrastructure for them in the name of security, even though in reality they hurt security through unnecessary complexity, addressing ambiguity, etc.