From the announcement: "You should consider the initial code to be at an alpha stage — it is not complete, not thoroughly tested, and not suitable for production use. We are planning to release a beta in the next few weeks, and expect it to stabilize and be ready for production by early summer (mid-2021)."

Given that Amazon announced the fork in January and they don't expect it to be production-ready until summer, I'm guessing they've underestimated the amount of work required to package and distribute a product as complex as Elasticsearch. Given that, I doubt they will be well-equipped to keep pace with new feature development.