Amazon RDS for PostgreSQL supports minor versions 16.3, 15.7, 14.12, 13.15, and 12.19

Amazon Relational Database Service (RDS) for PostgreSQL now supports the latest minor versions PostgreSQL 16.3, 15.7, 14.12, 13.15, and 12.19. This release of RDS for PostgreSQL also includes support for pgvector 0.7.0, which lets you index vectors larger than 2,000 dimensions and adds support for scalar and binary quantization through expression indexes. 

Source:: Amazon AWS