[Announcement] Amazon RDS for PostgreSQL 11 will reach end of standard support on February 29, 2024

As you already know, it is correct that RDS extended support can be opted in through the AWS Management Console or the AWS CLI or RDS APIs.

However, the release date for opt in is still not announced. It is expected to be released in the late December where you will be able to opt-in for extended support for your PostgreSQL v11 instances. You can refer the below document for more information on the same:

[+] https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/extended-support.html

Further announcements for the specific dates will be posted on our What's New page and AWS News Blog.

[+] https://aws.amazon.com/new/
[+] https://aws.amazon.com/blogs/aws/

Hello.

You will now be automatically enrolled in Amazon RDS Extended Support starting February 29, 2024.
This means that you do not need to opt-in and will be automatically enrolled in Extended Support, so if you cannot afford to incur Extended Support fees, please upgrade your DB version.
https://aws.amazon.com/blogs/aws/your-mysql-5-7-and-postgresql-11-databases-will-be-automatically-enrolled-into-amazon-rds-extended-support/